I predict…

… there will be more posts coming in the uncertain future, with photos and trivia, and perhaps some changes to the regular content.

There. That sounds much better than my excuses for not posting something substantial now, right?

Maybe not.

reflection of Canada goose Branta canadensisAnyway, I’ve been juggling various tasks and projects, and I have two posts definitely in the works – the problem is, one is about mantids again and I want to space it out, even though it’s by far the easiest to write, while the other will take more prep time than I’ve been able to give. So, you get this semi-abstract image while I fill a little space telling you about some idle thoughts.

One possible change is, again, podcasting. I tried it some time back, carried it for a year, then let it go – I wasn’t sure it added anything except a lot of preparation. But on listening to George Hrab’s Geologic podcast recently, I have been toying with the idea of changing the format a bit; instead of just reading off a longer philosophical post, I may try recounting various experiences when out doing nature photography. You see, I’d settled on the ‘audiobook’ format because I didn’t want a lot of pauses and “uhhh”s in there, and because I felt that some of the stuff I’d written gained more emphasis from verbal delivery, making it the obvious choice for the experiment. Trying the new approach does mean that I will be working (poetic license abused there) off-the-cuff, with all the oral foibles that I am prone, while attempting a coherent story, an interesting delivery, and an acceptable amount of humor. This may be a serious mistake on all of those counts, but I will be trying some dry runs first, so they’ll have to pass my standards before they appear here (like that’s reassuring.) If nothing ever appears, well, let’s just say you were spared.

The podcasting thing was resurrected from my photography habits, which is possibly not what you’re imagining; it’s not all just taking pictures. I often end up with a lot of images to sort, which means deleting those which don’t pass muster, pondering if any particular image passes muster, and shifting the keepers into the appropriate categories, as well as adding the information about the image to a database (the part that I’m really behind on right now.) It’s time-consuming, and I usually have music playing when it’s going on, but recently tried finding some decent podcasts to let play while I work. After doing a search for the better comedy podcasts, Geologic won out over the others by a wide margin; most of them were too scattered, had a clash of too many voices, or simply lacked anything interesting to say. George Hrab is engaging, involved in the content, and not overly-concerned with trying to “be more funny,” nor competing with other voices; it is, as far as I’m concerned, how it should be done. Plus, anyone that can rip off a subtle quote from Midnight Run gains a lot of Brownie points from Al. So many, in fact, that he’s now been added to the blogroll on the sidebar.

Will my attempts even approach Geologic’s level? No. Will I be trying to shamelessly copy his style? No – despite my obvious shamelessness. Is this something I shouldn’t be doing at all? Quite possibly. We’ll just have to see what happens.

Mantodea reditum

That means, “return to the mantids.” Maybe. Probably not – it’s Latinish, one of many languages I have mastered not in the slightest form whatsoever.

Chinese mantis Tenodera sinensis poised on parsley flower
Lest you think something has terrible happened to my mind, I hasten to assure you that I have been keeping tabs on the mantises, even when I haven’t been posting anything. There is now a vast size difference between individuals, but no easy way of demonstrating this, so you’ll just have to take my word on it for now.

unidentified mantis on Dracaena grass
First off, the Carolina mantids (Stagmomantis carolina) seem to have dispersed entirely from their hatching point in the backyard, appearing nowhere that I have seen, though there’s a slim possibility, going only from the size, that the specimen above is one that made it around to the front porch area. Right now, I cannot say whether the Carolina mantids largely vacated the area or fell prey to various hazards, among them quite possibly their own cousins. The Chinese mantids (Tenodera sinensis) had hatched around the front of the house – mostly; I’ve seen a couple in the back – and have spread out a bit to various locations in the yard, with a handful still occupying the immediate environs of the egg case that I witnessed hatching (more or less.) This means the front garden with the day lilies and peonies, and the Japanese maple sitting on the other side of the front door. All of these locations served as their habitat all summer long last year, so I’m expecting the same again this year, but we’ll see how that goes. It’s handy to have photo subjects so close by.

Chinese mantis Tenodera sinensis on rosemary plant
A few have even made it over to the rosemary plants, where at their present size they camouflage amazingly well. This won’t last long; they’re going to get a lot bigger than the rosemary leaves/needles ever will, but right now they’re almost invisible. You did see the one above, right?

Carolina mantis Tenodera sinensis on eating black ant on pokeweed plant Phytolacca americana
There’s not a whole lot of behavior to photograph – they eat, and on rare occasion they molt their exoskeletons, which so far I haven’t spotted (I think I just missed one.) But I occasionally catch them eating, and for two of them, they initially dodged me as I drew close with the camera, but after only a half-minute they felt it was safe enough and thereafter ignored me. Above, this one looks like a distant aunt bestowing an unwanted kiss on a reluctant nephew, which is sorta right I guess. Most aunts don’t eat their nephews around here, but I can’t speak for other cultures…

Chinese mantis Tenodera sinensis with roach
I shot this one just a few hours ago, as it partook of an average-sized roach (they can get a hell of a lot bigger around here.) This one was a measured 40 mm in body length, so about four times the size it was when first hatched, and the biggest in the area to my knowledge – it’s perched on a peony leaf, if that helps at all. It might, in fact, be the same one I photographed three nights ago on the mint plants, but that one was bright green at the time. They can change colors, but I believe it only happens after a molt, and I’m not sure how soon afterward, whether they emerge in a different color or the chitin becomes that hue over time as it hardens. This is one of those things that I’m hoping to witness someday, since so far no source that I’ve found has clarified this matter.

Chiinese mantis Tenodera sinensis in profile showing eye color
This is the photo from three days ago, left until the end for the fartistic merit. The translucence visible in the exoskeleton lends a little weight to this being soon after a molt, but I never saw the discarded skin so I’m only speculating. More noticeable is the eye color. I’ve mentioned before that, at night, mantis eyes turn black, presumably to help them see better, but it only takes place after a certain age, and this one appears to be on the border of that – two of the images above were taken at night, but you wouldn’t be able to tell that from the eyes. The eyes of this one are incompletely black, still bearing some of the daytime stripe on the sides, even though this was well after nightfall. At some point I might stake one out at dusk and photograph a whole sequence of the change.

Right now I’m still pondering potential methods of telling them apart. Since they molt their skins periodically, a little dab of paint or dye will be discarded then, and there are no other markings that are unique to individuals; I’m not even contemplating any body modifications that would be retained after a molt, such as lopping off a foot. Maybe I just need to teach myself DNA sequencing…

But how? Part 21: Assertion

So, I started this category many moons ago with the idea that it would be used to answer (mostly unasked) questions that religious folk like to pose towards atheists, essentially showing how a secular standpoint covers more bases than it’s usually given credit for. At times since, the structure of posing an initial question hasn’t really worked, yet I still felt that the topic fit in with the overall theme. We’re going to completely subvert the concept with this one, because today’s topic is assertion, which is about as far removed from seeking answers as one can get.

The vast majority of religions rely distinctly on assertions – statements of supposed Truth™ that come without any supporting evidence or even rationale. At best, there are references to scripture, which is a term used for stories that are asserted as being not just true, but divinely-inspired – in complete disregard of the entire concept of fiction, including the bare fact that it’s thousands of times easier to write than absolute truth. Challenge any religious person to provide support at all for the idea that their scripture is factual, and the vast majority of the times all you’ll hear is, “Because it says so right inside!” It’s extremely hard to treat such claims with dignity rather than blurting out, “You’re just not grasping how fiction works, are you?”

Much worse, however, are the millions of direct claims made without even the support of scripture, ranging from what was really meant to radical reinterpretations and, at times, completely unrelated statements. While most of the major religions rely on a specific set of scripture, they somehow manage to section off into thousands of variations, each with their own sets of rules and truths. If you think about it, scripture should certainly be able to stand on its own, without any authority figure to express or interpret it – no priests or rabbis or imams or other holy folk – but this is hardly the case, is it? And from these myriad religious leaders comes a huge selection of verities, many at remarkable odds to one another despite supposedly coming from the same source. Saying nothing, naturally, of the wide variety of religions the world over, all laying claim to truth and purity.

Overall, though, it’s not hard to see why assertion is even used in the first place. Our nature as a species is to puzzle things out, to seek answers, and we especially don’t like uncertainty – there are strong indications that uncertainty sets up negative reactions in our brains. The physical world isn’t very accommodating in such regards; lots of things that we deal with have no certainty to them, no absolutes, no clear demarcations. Nature has but a few laws, and beyond those constraints everything exists in a vast grey area. We are the ones that impose names and numbers, that rely on Olympics and Guinness Books, that determine species and states and speed limits, that even have a concept of best. The only comparisons in nature take place on extremely limited scales, determining what’s better right at the moment. While there may be a fastest springbok in the world, the sole thing that matters is if any of them are fast enough to avoid the predator currently bearing down.

Yet, with all this plainly evident around us, we take solace in absolutes; we want answers that will remain the same regardless, so we never have to compare, never have to think about them again. And we want this bad enough that we’ll actually fall for assertions, readily ignoring the fact that there is no method of absolute certainty, and no examples of such. We even use worthless shortcuts in our thinking to produce such states, believing, for instance, that the most expensive product is the best. Advertisers, restricted by laws against fraud or unsubstantiated claims, nevertheless find ways to assure us of their product’s superiority with such statements as, “the most efficient in its class,” never telling us what the class consists of or exactly how few others inhabit it. Time and again, we’re told to speak confidently – it will help us in public speaking, in sales pitches, in interactions with potential mates; we’re almost never told to back up our claims, just to sound like we’re assured of ourselves. Such a simple and transparent thing, and we’ve been relying on it for centuries, if not millennia.

There’s more to it than that, however. We’re also ridiculously prone to following the flock, eschewing individuality of thought and decision in favor of group acceptance and support. If enough other people believe it, then hey, it must be true, assuming unconsciously that they’ve done the legwork, at least. Conformity and social dynamics takes precedence, far too often, over rational consideration, making us more afraid of standing out than of making a wrong decision. Churches, unsurprisingly, prey on this, usually requiring weekly (at least) devotionals in the biggest roomful of people they can manage – with commensurate fees, of course. While we can receive schooling in our youth and somehow, miraculously, retain most of this throughout our lives, basic ethical guidelines from a single set of scripture seem to flee our minds within days. Funny, that.

It is interesting comparing this approach with that used within most forms of schooling, and maintained throughout all scientific endeavor. Certainty is considered unattainable, and truth is a lie; we have only what we can demonstrate, the effects that stem from the causes. The binary yes/no, true/false ideology is ignored in favor of probability, the confidence we can have in seeing the same results over and over again. No one has to assure us that heat will dissipate among its surroundings, or assert that gravity really exists; there’s no point to it because it’s readily observable. Questioning is just fine, even encouraged, and usually results in answers and demonstrations – no faith is necessary nor requested. In fact, this callback to our school days is informative in itself, because the worst teachers were the ones that asserted and failed to explain. Aside from that, it was the bullies that shouted to try and drive their points home, unable to make a plausible case and too insecure to consider other alternatives. How many among them were trying to drown out not just the voices of dissent among the others, but the voices of uncertainty within their own heads?

When it comes to religious ‘discussions,’ especially online and anonymous, the assertions come flying fast and thick. It’s easy to understand why so many religious folk find it necessary to separate the schooling of their children from the public offerings, and easy to spot those that have received this little gift. The only thing that one can do with an assertion is repeat it, more forcefully if necessary – who hasn’t seen the ALL CAPS tactic? – or perhaps buttressed with the threats of damnation. It’s unfortunate that too many adults fail to perceive of the disservice they do to children in this regard, terrified of the possibility of ‘straying’ or perhaps assured that this was the best way, but those who cannot handle a logical chain of thought, that know only how to repeat, cannot fare well in countless aspects of our culture; bearing a self-imposed title of superiority isn’t one percent as useful as being functional and able to think on one’s own.

More numerous are the ones who straddle the fence, willing to engage in actual discussion but unable to relinquish the hold of the assertion. Faced with the myriad things imparted to them in their religious schooling that are not reflected in any form in our physical world, they cannot entertain the thought that the assertions were dead wrong, but instead try to find ways to excuse the discrepancies, often creating entirely new assertions just to shore up the original ones. From such tactics we have the oft-repeated ideas that the vast fossil record is a test of faith, or that the six days of creation were metaphorical days (because, you know, we feeble-minded humans needed an easier term to grasp than, “thousands of years.”) Very frequently, these new explanations, springing only from the imagination of those proposing them, are then treated as unassailable facts, instead of just one of many thousands of possible explanations for the discrepancies. It’s commendable to be open-minded, as we are often urged, and consider other explanations – but this should also (if we are being honest and truly open-minded) include explanations that do not support the assertions, rather than whatever one works best to shore up the faith, all others be damned. Moreover, there isn’t a lot of value to considering the thousands of different explanations, unless we actually stop and consider which ones fit best, and especially, which predict future results; this is probability, the functional application of considering the options, because it serves to start selecting out the unlikely ones and culling our options down to the fewest possible.

That ‘future use’ bit is the primary and overriding benefit of knowledge. If we learn something that can tell us what will happen, it’s hard to argue the usefulness of this, isn’t it? Religion and scripture are notoriously bad about this, the vast majority of predictions related through them having already failed to occur (and still conveniently dodged with even more assertions.) As we learned about physical laws and properties, we put them to continual and ever-expanding use, improving our living conditions hugely, and even informing us of what can go wrong – while religion has been attempting to guide mankind in moral and behavioral manners for centuries to millennia with remarkably little to show for it. Instead, most of what assertion accomplishes is the indulgence of the religious individual, permitting them to avoid ever having to admit to being wrong, denying the value of certainty through dependable results and replacing it with certainty by declaration, all evidence to the contrary being dismissed. And all that this accomplishes is a sop to their own ego.

We, as a species, have a hard time admitting to being wrong, a peculiar facet of competition and social judgment. The ugly truth is, we simply cannot avoid being wrong – it’s going to happen, every day in fact. We can deny that this occurs, or we can learn from it, using it to guide our future selves into more accurate and useful decisions – and this is actually the way our brains work, their primary purpose in fact. Sometimes it’s easy; sometimes it takes a lot of thought. Yet nothing about thinking is actually hard – the only hard part is not getting the answer right away, the indulgence that we desire (especially one that panders to our egos.) But, you tell me: is it better to work for this indulgence, and arrive at answers that provide future benefit, or is it better to find ways to fake it just for the immediate gratification?

And finally, a simple observation: truth should be plainly self-evident – I mean, how could it not? Yet if we ever have to insist that this is how things must be – if we ever have to assert a state of affairs to convince others because the evidence simply doesn’t support it – how can we, in any manner, consider this truth? Why would such a thing even be necessary?

In my defense

… he says, with a touch of self-consciousness and insecurity.

First off, an apology for being away as long as I have, especially when I said I’d be following the progress of the hawks. I’d actually started this post many days ago, but while it was in draft form, a little over a week back, I was away for the day and the hawk fledglings chose that day to leave the nest. I’d been monitoring their progress by their size and feathers, and while they were big enough, I didn’t think their feather coverage was adequate yet – so much for my judgment. I have seen no sign of them since, though I occasionally hear an adult sounding off with territorial cries, but basically I lost a lot of desire to follow up when I had zilcho to follow up with. Just for the sake of it, I’m going ahead with the original post immediately below.

You might have noticed that the photos of the red-shouldered hawk family are not up to the same quality seen throughout the blog and main site; if you haven’t, well, good, but your eyes suck. As a regular visitor to Why Evolution Is True and his featuring of readers’ wildlife photos a few times a week, I don’t even bother submitting the hawk photos since I feel they’re not up to the standards already set therein.

red-shouldered hawk Buteo lineatus juveniles standing erect on nest near sunset
I’d like them to be better myself of course, but it likely isn’t going to happen anytime soon, and isn’t possible right now. Here’s why.

red-shouldered hawk Buteo lineatus nest in full frame without croppingFirst off, recognize that the nest is fairly distant, and even my longest lens doesn’t get all that ‘close’ – the Sigma 170-500mm can only do so much. The image to the right is full-frame, my typical view in the viewfinder before cropping down to provide a better image of the subjects. Then, autofocus is out of the question; even in the center of the frame, the distance of everything that it might lock onto varies by several meters, so it’s much better to go with manual focus where I know it’s on precisely the subject I want it to be on, and can’t suddenly decide to wander off to something else right as interesting behavior is being displayed.

But the viewfinder is only so clear; the catchlight in the eyes, visible in the top, cropped version of the same image, is barely visible when I’m focusing, and that’s only when the hawks are in a position and the light is bright enough to provide this, which isn’t often. At all other times, I’m trying to nail sharpest focus by picking the speckled plumage, or the edge of a beak. There’s too much room for slop.

The Sigma 170-500 is an ‘okay’ performer – all right for non-critical uses, but not up to the quality of many other lenses. All of those cost quite a bit more, however, and I have a simple operating principle. While I take my nature photography seriously, it brings in a very limited income, and amounts to just slightly more than a hobby; I make more from students than I do from selling these images. It would be nice to think that, by investing in a better lens, I’ll get more income, but the macro lenses I use are ridiculously sharp and haven’t been resulting in more sales, so that assumption isn’t holding up. I don’t have a lot of disposable income and am notably frugal; if it will pay for itself, I’ll drop the money, but that isn’t being demonstrated, and I have more important things to direct that money towards.

Then there are the traits of the lens itself. It gets noticeably sharper as it’s stopped down to f11 or so, and backed off slightly from 500mm. Stopping down, naturally, means longer shutter speeds or a higher ISO, both of which can degrade the image. It’s easy enough for the hawks to move just a little during a slower shutter speed and blur themselves away from critical sharpness, to say nothing of the tree swaying. Also, the focus ring is designed with a very short travel, handy for quick focusing, but it means that a very small twitch can make the difference between ideal focus and being far enough off to wreck image quality.

non-magnified view of nest
Roughly what the normal, unaided view of the nest is – that bright spot in the double-fork, upper right
On top of that, there are the facets of shooting with any long lens. The more the magnification, the more chance that camera shake will actually be seen in the image as motion blur, and there’s only so much that a tripod can do. The vibrations of the mirror slapping up and the shutter opening actually start the camera shaking, very slightly, but at 450mm or so it’s occasionally enough, worsened by a longer shutter speed where the camera has time to bounce back and forth a tiny bit while the shutter is open. To counteract this slightly, I’ve been using a remote release cord so I’m not even touching the camera, but that only eradicates my vibrations, and not the camera’s. Somewhere around here I have a secondary support arm to help stabilize the camera when using a long lens but I haven’t actually dug it out for these photos; that’s my laziness, since it greatly increases the setup time, but I really should be using it.

Since I’m 183 cm in height (6 feet,) the tripod has to be tall to hold the camera at eye level, more so when it’s aimed up and thus should be slightly higher. But the higher and more extended the tripod, the more vibration it’s prone to. The simple improvement for this was to move a handy chair to my shooting location and lower the tripod down to eye-level when seated; I could have lowered it further and just sat on the ground too, but my shooting location was not ideal for this.

All of these present things to consider when pursuing nature photography. One can spend a lot of money on it, but even the best lenses won’t overcome all of these issues, and there will always be a situation that exceeds the capabilities of one’s equipment. As I’ve always recommended, the first thing that you do is concentrate on overcoming the limitations with what’s immediately available: stabilizing the lens and camera more, or getting closer (or more light.) Using the equipment in its optimal configurations, like stopping down the aperture. Finding subjects that are more ideally situated. There is often a lot that can be done first without throwing new equipment (and thus more money) at the problem. And on top of this, it helps to know what the equipment can do for you, and what it can’t. While another 100mm in focal length is nice, it’s not that much more magnification, and if it comes at the expense of sharpness or maximum aperture, it won’t improve things much, if at all.

And all of it depends on how cooperative, or not, your subjects are ;-)

The real May abstract

ginkgo Ginkgo biloba leaves against sky
For reasons unknown, I had it in my head yesterday that we were in June, with only thirty days, and thus had to post the month-end abstract yesterday. After midnight, a glance down at the date/time bar on the computer screen reminded me of my error, which I was willing to let go until I spotted a better abstract while sorting images just now. The blog auditors will be wondering how we ended up with extra abstract images at the fiscal year end, but by then I plan to be long out of the country.

These are the leaves of a ginkgo tree, Ginkgo biloba, and there’s a bit of trivia regarding this species in that it is a living fossil. Which doesn’t actually make any senses – it’s a stupid phrase, really – but what is usually meant by it is that we have evidence of very similar species going way back in the fossil record with very little visible change, and this is the only example we have; nothing else shares its class, order, or genus, which is exceptionally rare in the plant or animal kingdoms. You can see the difference in the leaf structure, not branching like most leaves, but the veins all originating directly from the stem. I have a book on curiosities of evolution that features the ginkgo, and once I actually set aside time to read it (I have a shelf of books I’ve been trying to get to,) I may be back with some more details. For now, it’s here as visual appreciation. So appreciate it, dammit!

Not completely irredeemable

Okay, after that last post we needed something a little more pleasant to look upon (which means, since they display in reverse order and I’m posting this almost immediately after the previous, that you’re receiving a warning of what will be found further down.) So how about a few images from one evening at the nearby pond? You even have the chance to express which one you like the most.

Let’s start with a green heron (Butorides virescens) that was hunting near sunset in a highly visible position. They’re notoriously shy birds and hard to get close to, but this one was intent on its hunting and we were able to creep closer than they normally allow. They’re not big birds, about the body size of crows, so many times smaller than the common great blue herons seen so often.

green heron Butorides virescens hunting at pond's edge
I wasn’t using a particularly long lens, so this was as good as it got – I’m pleased that, with all the distortion in the reflection, the eye itself stood out so well, and in such good light. Almost immediately after this shot, the heron took a stab at a minnow, missed, and flew off, having tolerated our presence for as long as it dared.

Only a few minutes before that, a trio of semi-resident Canada geese (Branta canadensis) decided it was time to wrap it up for the day and took flight, heading off to wherever they settled for the evening; others that were raising young on the pond spend the nights there. As they passed by at low level, wings whirring like faint bullroarers, I tracked them, panning the camera with their movement while firing off several frames. It’s not often that I have the opportunity to try out this technique, and most times it hasn’t produced anything worthwhile, but this time around I liked the results.

Canada geese Branta canandensis taking flight over pond
While it would be ideal to catch the wings in a particular position for best fartistic effect, this isn’t something that I can suggest pursuing – the wing beats are too fast that even catching one goose at just the right point would take exquisite timing; three of them would be entirely luck. These two images are at 1/100 and 1/125 second. Had I held still and fired off my frames as the geese crossed (or stopped my panning motion as I tripped the shutter,) they would have blurred from the lateral movement of the geese – this becomes clear when you look at the blur of the background, streaked horizontally from the camera motion. So I’m pleased that the geese are as sharp as they are. In fact, you can even find a hint of catchlight, sunlight reflecting off of the eye, in both images.

Canada geese Branta canandensis taking flight over pond
Now, I’m torn between these two in regards to which I like the most. I prefer the top one for the positions and clarity of the geese, but the bottom one for the background. Had I only posted one, it might be easy to judge it on its own merits, but with the two close together to compare how they could be different (which is something I do all the time when sorting images,) picking the one that’s best becomes a little trickier. Or it does to me anyway; you might have no problem with dismissing them both. Fine. Be that way.

The real mindset, the one that I encourage everyone to have (and not just with photography,) is to keep thinking of how it could be better. Good shot? Great – be proud of it! But go get a better one now…

A select few

It’s true; only a few special people would not only notice details like this, but photograph it in fine detail. I’ll let you supply your own definition of ‘special’ for these circumstances…

In clearing out some areas of the yard the other day, I disturbed some wet leaves and wood pulp and exposed my friend here, obviously suited to a hidden and protected existence. I had to include a scale shot – this is easily the biggest grub I’ve ever seen, and my best guess is this being a patent-leather beetle (Odontotaenius disjunctus,) judging from the size and the habitat. But the size isn’t the most interesting bit.

scale photo of grub, possibly patent-leather beetle Odontotaenius disjunctus
I don’t know if this image really conveys the correct impression or not (don’t worry – I’m on it,) but the grub was both seriously distended and almost completely transparent. This allowed me to illustrate two particular facets, which of course I will inflict upon present to you.

large grub possibly patent leather beetle Odontotaenius disjunctus showing internal anatomy
The entire hind-end of the abdomen, taking up 1/3 the mass of the whole insect, was engorged with a brown mass that was likely wood pulp under digestion, but resembled brains more than anything else, especially due to the bi-lateral ‘lobes’ appearance. If I’m correct in my assessment, this would seem to indicate that the digestive tract of the beetle (?) is bifurcated, and thus significantly different from our own – no surprise there of course, but it’s little reminders like this that carry us away from the assumptions of similarity that we’re prone to make. And while I’m here I have to say that, as I was getting these photos, the grub would perform an occasional ‘contraction’ and the brown mass would shift under the skin, and not all at once either, but in different sections. There’s something very different about seeing working internal anatomy.

It’s easy to think that the lobed appearance might indicate lungs or something, but that’s completely on the wrong track, and the second facet that is being illustrated. As I’ve posted about twice before, here and here, arthropods have an entirely different respiratory system. In most cases, they have little openings along the thorax and abdomen, called spiracles, that feed into a branching network of tracheoles that carry oxygen to the tissues directly, without having to use a circulatory system like mammals do. I was lucky enough to find some caterpillars that showed this visibly through their skin (the first link above,) but this guy didn’t even require magnification – the networks were easily visible by eye. And in fact, so visible that, under magnification, the bigger branches actually had a translucent appearance.

visible tracheole network of grub possibly patent-leather beetle Odontotaenius disjunctus
[Yes, there’s a little piece of bright blue fiber next to a rust-orange spiracle that looks like somebody was being careless with a pen – don’t ask me where it came from, and I didn’t see it when taking the photos.]

There is no muscular mechanism for pumping air in and out of the body for insects, or at least the majority of them – it just comes in largely through the flexing of the abdomen and internal organs. Arthropods don’t actually need much oxygen, both because of their size and because their metabolism doesn’t require it as a catalyst as much as mammals do – a little goes a long way. This is why exterminators that treat a house must evacuate everyone and seal it up, since the concentrations of pesticide that are required are a lot higher than what would affect us, weaklings that we are.

The spiracles themselves were also big, larger than I’ve seen on any arthropod, and peculiarly-shaped – right now I could only speculate as to why, so we’ll just leave my ignorance sitting quietly in a corner rather than parading it around for all to see.

spiracle detail for grub, possibly patent-leather beetle Odontotaenius disjunctus
The exoskeleton around the spiracles seemed to take on a thicker and more opaque appearance, giving the impression of being ‘reinforced’ there for some reason, but on very close inspection it looked more like a spray of tiny tracheole to feed the closest tissue. Where would you be without people like me to present the wonders of the arthropod world to you? Probably sleeping better at night, is my guess…

While those chelicerae (‘fangs,’ ‘jaws,’ whatever you like) in the top photo look capable of dealing a serious pinch at least, I never encountered them in that manner, and the grub stayed mostly curled up tight in a defensive posture, not helped at all by me shifting it to a better angle for images every time it decided it was safe and started unrolling again. After these photos, and grossing out The Girlfriend, I returned it to where I had found it. It might have been interesting to see what it eventually morphed into as an adult, but I don’t really have any method of housing it for such. And I think it was actually too big to consider feeding to the resident green frogs, who seem to be keeping the spider populations in the yard down anyway.

Month end and Monday color

Fritillary, perhaps Speyeria hydaspe, against streaky green backgroundAnyone is free to pick on me regarding my definition of ‘abstract’ for this one, and I won’t argue – it doesn’t really fit with my own definition. But it’s what I have from a month that included few choices for a month-end abstract. This fritillary butterfly, which might be a Speyeria hydaspe, went well against the streaked background, which is actually a stand of pitcher plants in the botanical garden, same location and day as my copperhead encounter from the previous post. I spotted this butterfly from the other side, and it was patient enough (or whatever quality you’d like to assign) to wait while I switched sides for a better view. You get to see the results when this works out; many times it doesn’t, and my subject vanishes before I can compose the image to my liking. So it goes – there will be other subjects and other opportunities. But I do have to say that I’ve gotten a lot better at stalking, having a decent grasp of what will spook off a living subject and what won’t – it’s not perfect, but it has increased my capture rate. Patience and moving slowly are extremely important, and just have to be a constant habit of any nature photographer.

And since it’s Monday, I will include another image from the same outing, an American five-lined skink that was arrogant enough (hey, might as well assign some fun anthropomorphisms if we’re going to do it) to remain in place where the sunlight would have the best effect on its skin hues. This one is likely a young adult male, since the blue tail is common in the juveniles of both sexes but the red head is a sign of adult males, so ‘arrogant’ might be pretty appropriate. The color range is great though, especially when considered from a temperature standpoint – you can just hear the locals commenting about this being one hot-headed, cold-assed skink. Or at least I can…

American five-lined skink PLestiodon fasciatus basking in sunlight
There will probably be a few more images from the same session coming along shortly, but first, we must take a break to feature more supremely creepy content, because I cannot capture images of that nature without generously sharing them with as many people as I can. Grotesquely magnanimous, that’s me…

Let me take this opportunity

Cruising through the botanical garden early yesterday morning, the very first thing I happened across was something that I’ve, honestly, never spotted in ‘the wild’ before. Which is pretty surprising to me, considering how often I specifically go out not just into prime habitats, but actually looking for snakes. You can put this down to rotten observation powers if you like; without someone else present who did spot all the snakes I missed to provide a necessary baseline, I can’t rationally argue it, but I seem to see a hell of a lot that others miss, so I personally put it down to just weird luck. This one was smack in the middle of a footpath, and its coloration made it subtle but not really camouflaged.

copperhead Agkistrodon contortrix spawled defensively in footpath
This is a copperhead, Agkistrodon contortrix, the only venomous snake in the area. By all accounts, there are a fair number of them around, meaning people stumble across them from time to time, but there are not so many that a serious hazard is presented. This particular one saw me at least as soon as I saw it, and instead of moving off the path (which it could do easily, into excellent protective cover,) it began giving warning displays. The first was the vibrating tail, which occurs among more than rattlesnakes, and it often presents a drumming, buzzing, or rattling sound depending on the material that it contacts – in this case it was silent. The second display is the classic and ominous one, the raising of its head from the ground and rearing back as if preparing to strike, which can be seen here – my position didn’t permit the best view of the head, and there wasn’t a lot I could (safely) do to remedy this. What concerned me was how easily someone who wasn’t paying attention could have stepped right up to the snake, which clearly wasn’t inclined to abandon its position. An awful lot of snake bites occur from people doing stupid things, and occasionally from not considering that they’re disturbing a prime habitat like brush piles, but in this case, it was clear someone could have been bitten just by not paying attention.

copperhead Agkistrodon contortrix abandoning the path
Now, I feel obligated to clarify a few things. Copperhead bites are rarely fatal, and the encounters few and far between; as such, they don’t really pose much of a threat, despite the reputation a lot of people want to impart to venomous snakes, and often every snake. Crossing the road is dangerous, and much more likely to result in a fatality. Playing with your stupid toy phone while driving a car is more dangerous still. We cope with these dangers by recognizing them and (usually) by avoiding doing the really stupid things, like walking out into the road without looking. And that same behavior pretty much eradicates all dangers from venomous snakes. Watch where you’re walking. Don’t leave brush piles in high-traffic areas. Don’t poke around blindly in the woods. It’s not hard.

But in a lot of cases, there is a perceived difference between dangers like cars, and venomous snakes. The snake is an example of agency; it can decide to attack you. Which is not exactly true: it decides to defend itself. While this might seem like semantics, it’s an important distinction, because the defensive behavior will only be displayed if the snake feels threatened – no snake can eat a human, nor do they have any vestige of animosity or ‘pre-emptive strikes’ or whatever (those belong solely to our own species.) To avoid snake bites, leave the snake alone. It really is that simple.

Plenty of people will tell you of truly aggressive snake attacks that they’ve heard of, which is fine if you’re inclined to believe every story you hear. The people who actually work in emergency rooms, and who catalog the reasons behind snake bites, tell a different story: most bites occur when someone initiates contact, either by attempting to ‘remove’ the snake, or by showing off in some testosterone-fueled idea of what’s necessary. I convinced the ‘aggressive’ snake here to leave the path, without even getting close to it – by stomping my feet. It felt the vibrations (they don’t have ears) and considered this a bad sign, slipping into the undergrowth out of harm’s way. That’s what the second photo is showing. And as much as I might have liked getting some better shots, I knew they weren’t worth increasing the risk (and I’ve handled more snakes than I can count, including copperheads when I worked animal rescue – that’s what that distinction of in ‘the wild’ meant up above, since all of my previous encounters were from initiated calls from the public, and not a random discovery like, seriously, 99% of my photography.)

By the way, a huge percentage of copperhead encounters are actually with anything but copperheads, and the same can be said for all venomous snakes. People that can’t tell a crow from a hawk will confidently tell you exactly what a venomous snake looks like; it’s much more dramatic than telling everyone they came across a corn snake in their yard. So for the purposes of safety, I will (once again) tell anyone who comes across this post how to identify a copperhead, quickly and dependably. And I do this not as much to protect people from copperheads, but to protect every other species from over-reactive nitwits.

copperhead Agkistrodon contortrix in detailHow to identify a copperhead. Copperheads have a distinctive pattern which can be easily discerned in multiple ways. The dark part of the pattern is hourglass-shaped, with the ‘waist’ of the hourglass falling along the spine. Seen from the side only, this may look like Hershey’s kisses. The pattern has a very ‘airbrushed’ look, fading rapidly from the edges, more so than any other species. Alone among North Carolina snakes (and possibly North America – not sure,) the dark portion of the pattern is thinnest along the spine; in every other species, the dark portion is broadest. And finally, the top of the head has no markings whatsoever, and is all one color. All of these can be seen immediately from any distance, and often with only a portion of the snake’s body visible.

Two other ‘coppery’ colored snakes in this area get mistaken for copperheads routinely, solely because nobody has taken the thirty seconds required to know how to tell them apart. They are both harmless, but you know what? That’s not even an issue. If anyone encounters a snake and cannot be assed to distinguish the species, a broom will convince any snake to move on. Not even whacking it, but a simple push (which is far less likely to provoke a defensive response from the snake – seriously, why piss it off if it’s not already?)

“But someone else will encounter it! Think of the children!” Yeah yeah yeah – see above about the number of actual encounters to begin with, and also about roads. We’re surrounded by speeding cars; we keep kids safe by teaching them some simple rules. A snake that has been chased from an area has already established the area as not safe; the likelihood of it returning (especially if the ideal hiding places have been cleared from the property) is low. Most snake bites do not occur in children, despite how oblivious they are to their surroundings. It’s the idiots that are trying to protect everyone else that get bitten far more often. And that’s when bites even occur, which really isn’t often at all – feel free to look at your own news reports and compare the snake bites to the pedestrian accidents…

Northern water snake Nerodia sipedon sunning itself on rock by creek
Seen above is a northern water snake, Nerodia sipedon – not venomous, despite their willingness to bite if provoked. I’ve encountered dozens of these, and only been bitten when I grabbed them. Copperheads do not hang out in the water – they eat things like mice, so they prefer woods and brush.

corn snake Pantherophis guttatus and two copperheads Agkistrodon contortrix
These are corn snakes, Pantherophis guttatus, housed with copperheads – you should easily be able to tell them apart. Corn snakes also aren’t venomous, and in fact are ridiculously mellow. I haven’t seen one of these in the wild either, come to think of it.

But overall, here’s all the guide you’ll need. Leave them alone – they’ll go about their own business, because they really don’t want any interactions with humans. If they’re in an area with enough human activity that you think an accidental encounter might occur, shoo them off – it’s trivially easy to do from a safe distance. Any other actions pretty much qualify as, “being stupid,” and you know what? We’re supposed to be the smart ones…

The snakes are taking a beating

While I’ve been keeping an eye on the progress of the red-shouldered hawk chicks, I’ve been having difficulty recording it due to a lack of free time concurrent with decent weather – we’ve had way too much rain for my liking. Yesterday I finally got it together, and the hawks were happy to oblige me.

fledgling red-shouldered hawk Buteo lineatus stretching wings on edge of nestThe chicks are getting quite sizable now, able to move about with almost the same agility as the adults and often seen standing upright near the edge of the nest. The baby down is giving way to the flight feathers in the wings and tail, but the main body feathers (called ‘coverts’) have yet to appear, which means the parents still hover over them on wet or chilly days. The body feathers are primary protection against the elements, forming both a water-resistant barrier and an outer layer that can trap their own body heat within; lacking these, they will rely on the parents for a while longer. Yet the growing surety of their movements and the alertness with which they view their surroundings is a marked change from just a week ago, not to mention that they’re surprisingly close to the adults in size now. I haven’t watched them for a long enough period to determine exactly how much they’re eating, but it certainly isn’t trivial.

red-shouldered hawk Buteo lineatus chicks in tug-of-war over small snake
From the previous observation of their behavior, it appeared that the fledglings were starting to feed themselves, and they confirmed this during a shooting session yesterday morning. A parent appeared and dropped a small snake into the nest, not bothering to try and carve it up; to be honest, I’m not sure they even had the opportunity. Both younguns immediately seized it by either end and started a fierce tug-of-war that was delightful to watch. In the image above, the adult is to the left, one fledgling to the right, with the other just visible between them – the dark snake is easy to spot, but if you look close, you can see that the middle fledgling has a grip as well; the pale sharp curve of the lower beak can be made out just underneath the stretched body of the snake, right under the parent’s breast. I said it before: I would love to have a better view, but it’s not going to happen. I boosted ISO for this session to allow for a smaller, sharper aperture and a little better shutter speed, and the hit to image quality can be seen. This is almost full-resolution, a tight crop from the original frame.

red-shouldered hawk fledglings fighting over snake
While the beaks and talons are likely well-enough developed to chop up something as easy as a snake, the young have an instinct to gulp as much as they can before their sibling does, so biting through the snake would have worked against this. Instead, they simply tried swallowing everything they could while pulling it away from the other, and here I caught the back one in mid-gulp. But hey, I can do even better than this.

aimated tug-of-war over a snake between two red-shouldered hawk fledglingsWhen the action started I simply held the shutter release down and let the frames crank out. Later on, I took fourteen consecutive frames and edited them into this animated gif (pronounced “gorbachev”) because it shows the amusing struggle much better. Yes, video would be even better – drop me a donation through that ‘Feed the gator’ widget to the right and we’ll see what I can do. In the meantime, we’ll carry on with the still photos.

(Has it occurred to you that if the snake had suddenly separated, at least one of them might have been flailing madly trying not to fall out of the nest? It certainly occurred to me.) Through it all, the parent simply watched impassively, probably ready to help out if the young still needed their meat cut up for them, but otherwise secure in the idea that they had little to do except provide. There’s no chance for an adult to play favorites now; the game is all about who grabs what first.

But the day wasn’t over yet. I was about to remark that the morning wasn’t even over yet, but looking at the timestamp on the next photos, I find that it was just barely after noon, so…

I had taken a break myself after the young polished off the small snake, but came back out to my post when the cries of the adults came rushing through the tree canopy. I was able to see both of them wheeling along the same flight paths, and vaguely suspected that I was seeing a territorial dispute with an interloper. However, the lead hawk alighted on a perch about half as distant to me as the nest, and within sight, too; moving the tripod by less than a meter afforded me a quite-clear view of the adult.

red-shouldered hawk Buteo lineatus finishing off a captured black rat snake Pantherophis obsoletus
It’s obvious that the parent had yet another snake, this one markedly larger than the previous, and the hawk was intent on ensuring that the snake was dead – not at all surprising, since this one was big enough to make an escape if dropped live into the nest. From close examination of the photos I identify this as a black rat snake, and we pause briefly here for taxonomic trivia. Formerly known as Elaphe obsoleta (obsoleta,) the nomenclature has changed, but there isn’t a universal agreement on this yet. Overall, the species is now considered Pantherophis obsoletus, but there is some dispute over whether three separate regional species can be recognized; if so, that would likely make this Pantherophis alleghaniensis. Whatever – this particular one is hawk food any way you slice it.

The other adult seemed agitated by this whole behavior, perhaps because it disapproved of any dicking around that delayed food getting to the young, perhaps because it did not trust the other to deliver the food rather than keeping it for itself; I suspected this myself when I saw the hawk in possession avoiding the nest, as well as avoiding the other parent when they came crashing down on an adjoining perch. The second parent returned to the nest empty-taloned after the first flew off out of immediate sight, but this didn’t last long. Within another minute, the snake was delivered to the nest where the young had been watching the dance of the adults. And in fact, it took another close examination of my photos to ensure that the snake really had been brought in, since the young simply stared at it, perhaps too full to contemplate another bite right now, perhaps a little overwhelmed at the size which would prevent easily slamming it down; this one was going to have to be carved up first.

red-shouldered hawks Buteo lineatus presenting black rat snake Pantherophis obsoletus to young
It’s safe to say that these fledglings are not suffering from neglect in the slightest, and also that the local snake population is being visibly reduced. That decline isn’t likely to drop off in the next couple of weeks as the young start flying and collecting their own meals, but it might eventually spread further out as they leave (or are driven from) the area to avoid competition. Before then, I’m hoping to capture a lot of images as they start to learn how to fly; once again, we’ll see what happens.

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