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Moonshots

Here’s the total lunar eclipse from the Phoenix area this morning, just before totality.  The desert skies were clear, so that we had a wonderful dark sky view of the first half of the event.  But totality began right at sunrise, so just as the whole moon was shadowed, it sank in a sky too bright to see the light reappear along the upper rim.  Still, it was spectacular!  Above, just digital zoom on a Canon Elph; below, digiscoped on a 50mm Nikon Fieldscope.  (All photos A.Shock)

Posted by Allison on Dec 10th 2011 | Filed in increments, natural history, yard list | Comments (2)

Tale of Two Tiny Tarantulas

On our way home from our weekend getaway, E and I stopped at Montezuma Well National Monument.  It’s one of our favorite places: a compact confluence of archæology, geology, and natural history. If you haven’t been there while visiting central Arizona, I highly recommend it.

>> Montezuma Well and beautiful fall color (all photos in this post either A or E Shock; click to enlarge)

As we were walking back to the truck, admiring the glow of the cottonwoods in the creek bed and dramatic clouds in a sapphire blue sky, I remembered to look down.  It was a good thing I did: underfoot were a couple of spiders.  Unaware of each other or of us, they were not going in straight lines as if to get from point to point, but were moving around deliberately, as if looking for eight lost contact lenses.  Each was a moderately large animal, the size of an adult wolf spider.  But they had round cephalothoraxes, and were black with lots of gray spiky hairs on their abdomens and stocky legs.  I bent over for a closer look, and wondered if I were seeing tiny tiny tarantulas.  Tiny for a tarantula, that is — they were still fairly large spiders, about an inch and a half from toe to toe.

<< on the go, places to be, females to find

We watched them for a while, got some pictures, and went on our way, hoping the squabbling tourist family on the trail behind us wouldn’t accidentally flatten the little guys through inattention.

Back on the highway in cell phone range, and uncertain if we’d really seen tarantulas, I consulted the internet and discovered this site: So You Found a Tarantula?  (In case you ever need to know how to transmit a live tarantula through the US Postal Service — and apparently there are good reasons to do this — this is your site.) It solicited questions, specimens for ID, and generated answers about things tarantular, including citizen science and advice about tarantula husbandry.

>> “Do not get too close: I am assuming the posture that indicates I am willing to kick irritating urticating hairs off my abdomen at you.”

Through this post on the website of the American Tarantula society, Dr. Brent Hendrixson of Millsaps College is trying to increase what’s known about American tarantulas, which for all our familiarity with them from heebie-jeebie movies turn out to be poorly understood in terms of their systematics and life history.

<< Keen sandal for scale.  Tiny tarantula is just to the left of the yellow leaf.

The website was fascinating, but it assumed you already knew you’d found a tarantula — it wasn’t set up to answer the question “Did I find a tarantula?”  And we weren’t sure: aren’t all tarantulas huge hairy hand-sized horrors?  Other tarantulas I’ve seen in the wild or in captivity were all enormous.  If tarantulas we had seen, then they were “toy” tarantulas, the chihuahuas, the tea-cup tarantulæ of the arachnid world.

After a little more research on the Web I was still undecided about their tarantularity, and decided to email Dr. Hendrixson photos of one of our dinky dudes asking if we had seen tarantulas, and if so, what kind?  Within minutes, I’d received an email reply from him: “Definitely a tarantula.”  This was exciting!  Better yet was the next part: “There are a number of ’small’ species in Arizona and it turns out that this one is most likely undescribed (i.e., doesn’t have a name yet).”

>> Possibly, these were adult males  wandering about searching for females’ burrows, where the ladies were waiting for male callers.

Sure enough, according to this website, there are 14 species of tarantula, all in the genus Aphonopelma, that live in Arizona: three in Maricopa, three in Pima, three in Coconino, etc.  But in Yavapai County, situated between Coconino County and Maricopa County, no tarantulas have been scientifically described.

This doesn’t mean that we discovered an unknown, new species of tarantula (although it is a possibility).  It’s just that biologists haven’t poked around enough tarantula burrows to know who answers the door in this location — it could be an already described species that also lives in an adjacent county.  We’ll have to wait to see what science decides.

In the meantime, we can fantasize about eponymous lightning striking twice: first Thermogladius shockii, now Aphonopelma shockii?  Well, of course not (that’s not how scientific nomenclature-giving works), but you can’t blame us for pretending.  Nevertheless, I’m still excited about having spotted diminutive, un-named tarantulas in the wild, who are living their lives entirely unconcerned that no one has ever slapped a latinate moniker on their hirsute posteriors.

Bonus etymology

All American tarantulas belong to the genus Aphonopelma.  According to Henry F. Beechhold, this name is derived from the Greek elements aphonos, “silent”, and pelma, “[sole of the] foot”.  (I haven’t cracked Liddell and Scott on this one, so we’ll have to take his word for this.)  I think it’s unfair of tarantulas — even tiny ones — to be pussy-footed; I’d rather be able to hear them coming. On the other hand, I once heard the click of a cockroach’s feet as it walked across ceramic tile, and that was fairly disturbing, so maybe, on second thought, silence is golden.

Posted by Allison on Nov 22nd 2011 | Filed in Invertebrata, close in, cool bug!, etymology/words, field trips, natural history | Comments (1)

Her majesty deigns to be photographed

I felt like a paparazza, drawing as close as I dared, trying to hold my proper camera with the big zoom steady in the failing light.  But she was calmly perched out in the open, low on our back fence, mobbed by smaller birds.  Hummingbirds orbited her, scolding, like cheeky electrons, but she ignored them. She looked at me, and looked away, bored.  She might be the same one I took photos of last year in our big pine tree; maybe, maybe not.

<< tonight’s Great Horned Owl, Bubo virginianus (all photos A.Shock, Canon EOS xti)

She was clutching E’s rain gauge — you can just see its acrylic rim over the fence, one of her dark talons curved over it.  Tomorrow morning I’ll go out to see if she left scratches in the plastic, like the woodpeckers do scrabbling for balance on the swinging hummingbird feeders.

I had been hearing the flickers, hummers, a couple of irate mockingbirds, the pair of thrashers who live in the yard, and even a gnatcatcher for a few minutes before it occurred to me go out to see what the fuss was all about.

Flickering flicker.  If you’ve ever wondered why this woodpecker species is called “gilded flicker”, you can see the golden coloration under the flight feathers and tail >>

The owl was overlooking a part of the yard where the cottontails have little cover but apparently there was no action, because after a while, she made a short flight into a small palo verde that has volunteered in the alley, and sat there for a while until it grew dark, looking around at her hostile avian entourage, glaring upward at a circling helicopter as if it were mobbing her too, yet still keeping a downward eye hoping for dinner.

<< On the palo verde throne, fierce-footed

When last seen, she launched towards the butte into the dusk, a gray blur against the graying sky.


Posted by Allison on Nov 16th 2011 | Filed in birds, natural history, owls, unexpected, yard list | Comments (5)

Spot the Bird!

Me: reminiscing about our trip to New Zealand a while back.  You: trying to Spot the Bird.

It shouldn’t be too hard, but here’s a hint: you’re looking for a parrot.  Now don’t go clicking on the photo to enlarge it right off the bat, you’ll make it too easy!  (And, by the way, it’s a giant file, so if you click twice, you’ll get a very large image of a partially obscured parrot on your screen.)

And on the subject of New Zealand ornithology, if you enjoy a nice kiwi, click here and watch the video.

Update: photo key is here.

Posted by Allison on Nov 6th 2011 | Filed in birding, birds, field trips, natural history, spot the bird | Comments (1)

Spot the bird (easy)

Yes, I realize that this is a very easy Spot the Bird.  Although it was hiding among the lower branches of a mesquite, the bird is very easy to spot, here in the photo.  But, driving past, not so easy.  And it doesn’t think it’s easy to spot.  The bird, a Greater Roadrunner, thinks it is well hidden, lurking like light leaking through leaves, looking for lizards.

<< Greater Roadrunner (photo A.Shock)

I spotted this bird in our neighborhood, where it’s been around recently, causing me to hope it’s taken up residence.  Go ahead, click to enlarge.  It’s even easier to spot.

Posted by Allison on Oct 5th 2011 | Filed in birding, birds, natural history, spot the bird | Comments (0)

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