Archive for the 'natural history' Category

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Rio Salado in early spring

Today I actually got outdoors to breathe air, soak up sunbeams, and take a look at what’s up, and what’s in the air.  It’d been awhile, and I thought I’d celebrate by passing along some of what’s happening along the Salt River, smack in the middle of the City of Phoenix, AZ.

<< green Goodding’s willows, brittle bush, Desert willow, and chuparosa at Rio Salado; photo A.Shock

The Rio Salado Habitat Preservation Area, as it’s officially designated (here is the website), is an  ex-horrific-riverside urban dump that’s been cleaned up and improved in order to attract and showcase permanent and migrating wildlife, including birds, mammals, and insects.

Along the Salt River just south of downtown Phoenix, the RSHPA is less than 10 miles downstream from the riparian area at Tempe Town Lake (see here), and has a variety of habitats, from mesquite bosque to shady bands of Goodding’s willows (the bright green foliage in the photo above.)  Each time I visit, the vegetation is better established, both naturally (Goodding’s willows are said to be able to grow something like six feet per year), and with the help of human hands — many native desert and riparian plants have been planted along the bike path and walking trails that weave along the river, on both sides.  Right now, the Goodding’s willows are in bloom.  The screwbean mesquites (right) are still bare, making their tightly-twisted seed pods stand out against the blue sky, clustered like little brown bouquets of rattlesnake rattles.

The river is high today after all of the rain in both the metro basin and in the high country north east of Phoenix, but it’s obviously been higher recently: big piles of flood debris are left on both sides of the trail. Cormorants (Double-crested and Neotropical), American coots, and Killdeer are common along the river, and the ponds and oxbows host a variety of waterfowl, like this handsome Ringnecked drake (left), Cinnamon teal, and Common moorhens.  But we were especially on the lookout for dinky dudes — in this case, an out-of-range straggler, a Black and white warbler that’s been hanging out at the Rio for at least a week.  It proved too dinky to photo, but we did get crippling looks at the tiny tourist, wrestling an enormous caterpillar into its gullet.  It was keeping company with a Brown creeper, numerous Orange-crowned and Yellow-rumped warblers, Ruby crowned kinglets, a Blue-gray gnatcatcher, and other dinky dudes.  A casual couple of hours of birding yielded a list of more than 35 species of birds, including a House wren.

But for me, the surprise of the day was provided by our furry mammalian neighbors: there’s a beaver working the Rio! We didn’t see the critter itself, but check out the evidence of Beavers At Work. right >>

I love the industrious pile of wood chips under the chewed ends of this downed tree.

Anyone birding in the Phoenix area during autumn through spring seasons might wish to check out RSHPA .

Remember — it’s an urban birding gem, so you might wish to bring a friend, and don’t leave anything valuable in your car.

Don’t be discouraged by the urban nature of this area, it’s got its advantages, too, like some really nice public art along the paths, and under the bridges on otherwise blank concrete supports.

>> Local wildlife painted under Central Ave bridge, RSHPA (all photos A.Shock)


Posted by Allison on Mar 3rd 2010 | Filed in birding, birds, botany, field trips, furbearers, natural history | Comments (0)

President’s Day: Hoover himself shows up

“Hoover” the semi-tame  African Collared Dove who inhabits our neighborhood came around for a handout of sunflower hearts and peanuts on Valentine’s Day.  It’s a bit of a sad story, in that he used to have a female companion, but no longer.  So far this spring he’s spent much of the day in plaintive calling — woooHOOOooo — over and over, as of yet to no avail.  There are others of his species living ferally in the area, but their numbers seem to be down from a few years ago.

So it seems appropriate to combine President’s Day with Valentine’s Day in wishing Hoover the best of luck this season of love and the executive branch in finding a feral girl-of-the-feather to hang with.

Posted by Allison on Feb 15th 2010 | Filed in birds, close in, natural history, yard list | Comments (4)

New! Spot the Bird!

A recent post, Spot the Pipit, inadvertently marked the inauguration of a series of themed posts in this webjournal: Spot the Bird.

After posting Spot the Pipit, it occurred to me that in the Three Star Owl photo files were other pix which showed birds that were more or less hard to see, but which were fun to look for.  Most of these shots were entirely by accident — at least one bird was so well hidden I didn’t even know there was a bird in the picture until I got the file downloaded to my computer and enlarged — so I can’t claim any real credit, just a sort of 99 monkeys with 99 cameras and 99999 photographs phenomenon.

The birds in Spot the Bird photos may not be easy to find for a variety of reasons: some may be in plain sight, but exceptionally well camouflaged; some may be deliberately trying to hide; some might be very very small or just part of a bird; some might not even be a bird.  Some might be visual jokes, or even manipulated photo images (which I will disclose).  And, there might be trick “Spot” moments…

So, keep a sharp eye out, and look for the Gilded (and very spotted) Flicker “Spot the Bird” logo (above), or search the Spot the Bird! category to find posts with a hidden critter photo challenge from now on out!

To get started, here’s an oldie but goodie that longtime readers of this blog will recognize: in the category of TUI (Totally Unmanipulated Image), I took this photo on the San Pedro River in Southeastern Arizona a few springs back. A version of it was featured in an older Three Star Owl post called Vertical Napping Bark, which also appeared as a guest post on Sharon Stiteler’s lively Birdchick.com site.

Can you Spot the Owl — or is it Owls?  Please let me know where the owl/s are, although there are no rewards except the knowledge that you Spotted the Bird.  (Click on the image to enlarge to make it easier, but not until you’ve given up otherwise)

Posted by Allison on Feb 5th 2010 | Filed in birds, natural history, spot the bird | Comments (4)

Spot the Pipit! plus: gallery of international pipits (a bird with a view)

There’s a small bird in this photo of lakeside rocks.  Can you spot the pipit?

Sunday E and I watched an American pipit (Anthus rubescens; photo E.Shock) working its way along water’s edge at Burnt Corral on Apache Lake east of Phoenix, darting after flies. beetles, larvae and other yummies around the cobbles in the shallow water. This is where it was working — not a bad view  (Photo A.Shock)>>

Pipits are sparrow-sized, sparrow-like birds which aren’t sparrows at all.  They’re the type of bird that people tend not to notice if they’re not birders.  It’s partly because pipits aren’t usually found in town or around neighborhoods — they breed in arctic and alpine tundra, and during winter, they frequent shores and coastlines, agricultural fields, and wild, open spaces.  Also, they’re easy to overlook: being beige and brown and streaky, they blend right into their backgrounds.  In the words of the Cornell Lab of Ornithology:

“The American Pipit is a small, slender, drab bird of open country. Although it appears similar to sparrows, it can be distinguished by its thin bill and its habit of bobbing its tail.” Click on this link to All About Birds for more info.

They share this habit of wagging tails gently up and down with other birds of stream-sides and shores such as Spotted sandpipers, wagtails, and dippers. Being in constant motion helps them blend in with their background of running water or wind-blown grasses.

The American pipit we were watching is in the center of this grainy enlargement, at the water’s edge, below the largest rock — click the photo to enlarge, if the bird’s still eluding you.  >>

But wait, there’s more!  Bonus international pipits:

It turns out that pipits inhabit wild open places the world around, even as far south as southern New Zealand, and also South Georgia island, roughtly between Antarctica and South America in the South Atlantic (and that’s a lot of “souths”).  Here is a photo of a shy New Zealand pipit which turned its head just as the shutter fired, and also a picture of the place it lives: this one was on the tops of heavily grazed sea bluffs in the Catlins, South Island NZ.

<< NZ pipit (Anthus novaseelandiae), an indigenous songbird of the island.(Photos E.Shock)

And, here is a South Georgia pipit (Anthus antarcticus), in its habitat, tussock (or, tussac) grass on the quite remote and windswept breeding islets off of the coast of South Georgia (Photos, A.Shock) <<

Seems as if pipits, although not very showy themselves, make their livings in some fairly spectacular scenery.

This is the first installment of:

Posted by Allison on Feb 1st 2010 | Filed in birds, close in, field trips, natural history, spot the bird | Comments (4)

Colorado indeed

It’s been an unusually wet gray week in the desert, and this has brought water to my mind in general, and some of its more colorful properties from wishful thinking.  So, here are some photos of brightly colored waters.  One is tinted by reflections on its surface, another by what’s under its surface, one by its sediment load, two by clarity and chemistry, and all by light.  The colors in the photos are natural.  (all photos A.Shock)

Autumn salt cedar reflected in the Salt River at Coon Bluff

Deep blue winter shadows on the Salt River from this past Sunday's trip up into the Sierra Ancha (see last post)

"Colorado" means colorful, and here is the mixing of the Colorado River (green) with its spring-fed tributary, the Little Colorado (aqua), at a red gravel bar in the Grand Canyon

Hot spring, Upper Geyser basin, Yellowstone National Park

Shallow water marine reefs seen from the air above Ambergris Caye, Belize. I'm pretty sure there are manatees down there, somewhere!

Posted by Allison on Jan 28th 2010 | Filed in field trips, natural history | Comments (2)

Winter in the Anchas

E and I went uphill today, to see what last week’s winter storms had brought to the higher terrain: a proper Sunday Drive.  We drove up into the Sierra Anchas, a rugged anchaswilderness area east of Phoenix, east of Lake Roosevelt, a place we seem never to explore frequently enough.  In a surprisingly short distance, the road passes through a wide range of landscapes, from the deserty upper Salt River canyon, through yucca-studded chaparral, oak-piñon woodland, and up to thick ponderosa pine forest.  The recent storms had brought the snow level down to about 3800 feet, so much of the area above the desert foothills was still blanketed in heavy, deep snow.

Here are some images from our day. (Photos A.Shock, except Phainopepla, E.Shock)

Above: The snowy Sierra Anchas from the Saguaro-rich foothills belowPHAIyuccablooms&pear

Above: Spent agave blooms and prickly pear in the snow;  right, a male Phainopepla perched by his favorite food, mistletoe berries.

Below: Ponderosa Pines near Sawmill Flat.ponderosas

Posted by Allison on Jan 24th 2010 | Filed in field trips, natural history | Comments (0)

Bonus beetles

Here are some boffo blue beetles.

I don’t know anything about them. We found them last year just below a cloud forest in southern Veracruz, Mexico, on the side of a road that crossed a re-grown lava flow.bluebeetles There were hundreds of them, congregating for reasons possible to guess at, but known only to themselves, in an astounding density. Each is just over 1/2 inch long, and the color is true.

Anyone know who they are?gangofblue

Here is an bonus unidentified beetle, big and green, seen at the same location.  It was almost 2 inches long.  The irregular dark shape that looks like backwards Texas in the highlight of its carapace is the reflection of my hand holding the camera.  That’s how reflective its shell was.  Click to enlarge, and look at all its little pores!biggreen

(All photos A.Shock)

Update: After looking around the internet, I believe the green beetle on the left is a Fig beetle, Cotinus sp.

I’m also working on the theory that the blue beetles may be cobalt milkweed beetles, Chrysochus cobaltinus, but further investigation is needed.

If these IDs are correct, both beetles are quite common, and also occur in the southern US.  The fig beetle is a favorite prey item of Mississippi kites, and no wonder — it looks like it might have some meat under its hood.

Posted by Allison on Jan 13th 2010 | Filed in Invertebrata, close in, cool bug!, natural history | Comments (1)

Picture of purples past

This is the very week many Costa’s hummingbirds leave our yard.  I know this because I’m keeping track, not out of obsessiveness, or possessiveness (well, maybe a little…), but because each winter I participate in the Cornell Laboratory of Ornithology’s Project Feeder Watch.  Like Christmas bird counts, it’s a way for science to harness the awesome powers of COHUbigbirdnerds and aviphiles across the nation.

<< male Costa’s hummer in our Little-leaf palo verde tree.  Go ahead and click on it to enlarge — I uploaded a huge image!

So, between November and April, I keep periodic count of birds that come to food sources in our yard: feeders, water features, flowers and plants, and other food sources like bunnies, finches and doves.  I report these winter bird censuses to Cornell Lab, and they compile the data into useful charts graphs and figures, which can be accessed by anyone online.

In previous posts, I’ve mentioned how our post-breeding population of Costa’s hummers balloons, with as many as 6 or 8 individuals, both males and females, coming daily to our feeders.  The males can be easy to tell apart, as some are young of the year, and are just growing in their flamboyant purple moustaches (properly called gorgets, like the piece of armor which protected the throats of knights, or the swath of cloth beneath the wimple some orders of nun wear), and the new feathers grow in distinctively, for a while enabling us to separate individuals by sight.  From July to January, the feeders in our yard are dominated by Costa’s.

But right after the New Year, many of them go away.  For instance, Yoyboy and Macho C, fierce contestants for our front porch feeder for months, have just recently moved on.  Some individuals do stay year round, and for right now, we still have at least one female coming to the feeders in the back, and at least two males — “C-Dude” and another nameless young of the year male — are still defending prime feeders in the back yard as well.  Time will tell if either stays here through summer.ANHU

For now, though, the Costa’s numbers are thinning, and the big Anna’s hummers are beginning their courtship cycle.

Anna’s hummer, photo by Will Elder of the National Park Service >>

For the last week, while the rest of the country fogs its glasses in a deep freeze, it’s been warm enough in Phoenix to open up the house, and I can hear the sharp, loud “chip” the Anna’s males accomplish at the bottom of steep, repetitive dives.  The sound has recently been discovered to be made by air rippling tail feathers as they descend, and it takes practice before the birds can make the noise consistently.  Little bullroarers, they swoop down on a female from high in the air, and chip just as they pass over her head in a millisecond, like miniature fighter planes at an airshow buzzing the crowd.  They’re just as fuel consumptive — I have to fill the nectar feeders twice a week or more.

So beginning now, my Feederwatch counts will have more Anna’s than Costa’s, until next year when the proportions are reversed again.  The next hummer change?  Around the first week of March, when the Black-chinned hummers fly in from their wintering grounds, and zip around the yard with their zizzing flight sound, dipping at the nectar sources alongside the Anna’s and resident Costa’s.
(This is Three Star Owl post #200!)

Posted by Allison on Jan 11th 2010 | Filed in birds, close in, natural history, yard list | Comments (1)

Got Gila Monster?

Gila monsters (Heloderma suspectum) are large stumpy lizards with bright handsome markings that are both cryptic and aposematic simultaneously, and whose hands look like neoprene wetsuit gloves with claws.  They are remarkable for being one of only two venomous lizard species in the world.  They live in the Sonoran and southern Great Basin Deserts and love to eat quail eggs, nestling birds and mammals, and other slow-moving prey items. (Below: captive gila monster on a wooden schoolhouse floor, photo A.Shock)captivegimo

Approximately life-sized clay Gila Monster “bowls” are items I only make one or two of per year or so. They’re quite time-consuming, since they’re textured, slipped, and glazed pretty much beaded lumpGIMOscale by beaded scale.  Here’s one now :

1)  I form a blob of clay that looks like a gila monster.  This early stage is the time to get any sinuousness in the tail, neck and belly, so the clay “remembers” it.  Then it’s time to put the wet lump aside to set up, or stiffen slightly, so that it can be shaped further.  Sponges help hold a pose, if spongeGIMOdesired.  >>

2)  As the water leaves it, the clay becomes more self-supporting.  While waiting for this to happen, I make legs — oddly spindly for such a stout body — with blocked out feet, to stiffen for adding later.  I also hollow out two thick places in the monster body, to aid in drying: the head, and the base of hollowheadGIMOthe tail.  This also makes the completed piece lighter and better balanced.  It is important to make a tiny, invisible passage into the hollow part from the outside, to let air escape during firing, or there could be an explosion.  <<

3)   With the clay slightly stiffer, I smooth the shape into its final form, including carving the toes from the blocked-out “hands”, and rounding the belly “bowl” part.  This shape causes herp boys to giggle, because it makes the lizard look like roadkill to those with scavenging permits for heloderm pelts.  From my point of view, it makes the piece functional, if desired: an Effigy Vessel, and not just a representation.

4)  The next step is to attach the legs, and texture the skin.  This must be done at a particular point of dryness, when the clay is still wet enough to accept the stamps I use to make the “nail-heads” in the skin (Heloderma bonedryGIMOmeans “nail-skin”), but stiff enough to hold up to the handling and pressure of stamping it.  Then it’s waiting for it to be bone-dry for slipping (right).  >>

The belly-texture, which looks like pink-and-black Indian corn on the cob, is carved into the clay rather than stamped — this is particularly time-consuming, especially for a part that isn’t seen very frequently.  Early on, I searched the web for a reference photo for Gi-Mo belly-scales, and never found one.  Fortunately, I persuaded a handler at a wildlife education event to flip a live one up for photos (she held it vertically, not upside-down), and got this great shot, which tells me all I need gimobellyto know about what the unders of a monster look like, including vent details (<< left).  You can just see the heavy-duty cowhide welding gloves the handler was wearing; they were covered with black half-moons: venom-marks from previous crabby bites.  <<

5)  Slipping an item bone dry is slightly risky, as adding water to a piece at this point can cause cracking.  But adding slip to a dry surface gives a crisper, less texture-obscuring coating.  I use a combo of commercial under-glazes and slips I make in the studio.  It’s necessary at this point to choose the subspecies:slippedGIMO the banded H.s. cinctum from the northern part of its range, or H.s. suspectum from the southern part, which has a more complicated reticulated pattern.  This one is kind of a combo. >>

6) After bisquing, I glaze the piece with dots (another labor and time-intensive step), each dot on the raised nail-head part of the texture, with a combination of black and pinkish-orange glazes.  After it’s fired, this adds depth of color and a glint to the lizard’s skin, similar to the fresh skin of a newly-molted lizard.  Sometimes, I add a leather tongue, if the monster’s mouth has been made slightly opened.  I’m looking into making a fully-open mouth next time, with wire teeth, giving it a really venomous-looking gape.  Here’s a shot of the finished version, a little more bulbous than an authentic lizard, but — after all, it’s a bowl: claygimo

Etymology

As mentioned above, Heloderma means “nail-skin”, for the fact that the monster’s skin looks studded or beaded rather than scaled.  suspectum, the species name, comes from the fact that early herpetologists were uncertain if the animal were venomous or not, and only suspected it was because of anecdotal accounts of its potentially lethal bite.  Eventually it was confirmed by laboratory experiments, and dissection, which revealed the large venom glands in the lower jaw.

Check out more info about the natural history of these lizards here.

All photos A.Shock

We hear that 2010…

new_ears…will be a great ear.

Happy New Year!

(Photo of snoozing Fennec at Phoenix Zoo by E.Shock)

Posted by Allison on Jan 1st 2010 | Filed in close in, natural history | Comments (0)

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