The Anna’s hummingbird hen is on the nest! This morning I saw her bringing small beakfuls of fluffy white material like spider web or some kind of aerial seeds and adding them. She would then settle in the cup of the nest, and wiggle a little, as if to get the shape perfect, and run her bill across the outer surface of the nest in what looked like a smoothing gesture.  Being a clever little hen, she’s chosen her site well — it’s hard to see from either above or below, but here is a picture, not well digiscoped but recognizable.

The tiny nest is built on the top of a pair of pinecones about ten feet off the ground.  Though the angle of the photo is from below, you can see the well-compacted mix of material packed onto the cones, with the hen’s little head and beak (pointing to the right) above it.

We have the scope set up a reasonable distance away from the spot on a walkway below the pine, and we can check on her throughout the day. We don’t know if she’s incubating yet, although as I mentioned, construction was still underway earlier today.  Stay tuned!

Photo by A. Shock.

Today I saw the First-of-Season Black-chinned hummingbird for our yard at the back door feeder.  It was a male, as the first birds always are.  He whirred in and made his characteristic little “chup-chup” feeding noise, pumping his longish tail and being generally tidy and well-defined in his gorget feathers, without moustaches.  Black-chinneds typically have longish, slightly-down-curved bills, a fairly flat crown, a sharp color difference between their breast and their chin (the lower edge of which flashes purple in the right light, but looks black otherwise), a graceful silhouette including a narrowish neck (compared to the no-necked Costa’s) and a distinctive s-shaped posture while drinking nectar.

“Black-chins” are breeding hummers here in the Phoenix area, but don’t stay year-round.  They’re with us from about now until late September or the beginning of October, when they return to their wintering grounds along the western coast of Mexico, north-central Mexican highlands or the Gulf Coast of the US.

In other yard hummer news, yesterday E found a female Anna’s building a nest on top of a pinecone cluster in the big Aleppo pine in the backyard.  It’s in the same general area we’ve seen Anna’s nest before in previous years, so it’s either the same bird re-nesting in a favorite area, or just a good place in the tree for Anna’s to build.   This branch has a mixed record of nesting success in the past: one Anna’s nest successfully hatched two fledgelings, but the most recent attempt was destroyed by a predator, perhaps a rat. We’ll try to get pictures and post progress.

The photo above is a male Black-chinned hummer from Wikimedia Commons.  The detail on this photo is excellent; be sure to click on it to enlarge!

When I left the Mississippi River Valley to come back to the West, I thought, Hmmmmm, no chickadees in the low desert.  What’s that going to be like?

We were very accustomed to Carolina chickadees as ever-present “fee-bay-fee-bee”-ers in our St. Louis yard.  They accompanied us on hikes; we heard them in the parks, they were everywhere, all year round — active little birds that deserve the gooey description “perky”, sociable to the point of seeming to boldly hang with people if there was seed to be had (safflower, yum!), or nesting fluff (white dog hair, good!). And in Berkeley and Santa Cruz, we’d encountered Chestnut-backed Chickadees frequently.  So when we got to Phoenix it seemed strange to not have “dees” about the place.

But we didn’t need to worry — here we have Verdin (Auriparus flaviceps).   The default little gray bird of the Sonoran desert is taxonomically unrelated to chickadees, but they are superficially like them in that they are small, predominantly gray, active birds who are common permanent residents in their habitat, vocal, and fairly unabashed by humans.  In fact, though they aren’t related, the Verdin’s genus, Auriparus, means “golden parid”, or chickadee-like bird (Chickadees and Titmice are members of the family Paridae.)

“Small” may not be emphatic enough: tiny, or even dinky (the technical term) is more like it.  Verdin are in fact among the smallest of North American song birds: bigger than hummingbirds, but that’s about it.  They flit and glean busily among the thorny green-branched desert trees emitting chip notes and a three-note call that’s frequent and loud considering the size of its source.  Their sounds, along with the mechanical Drr-brrr-drr-brr-drr of cactus wrens and the Curve-billed thrasher’s quick “whit-wheat”, means home to me.

The photo at the top of the post, taken in our yard, is of a male doing nestling-feeding duties — you can see he’s got a little something in his beak.  He was so busy he allowed me to approach fairly closely, and you can see one of the most excellent things about Verdin: the color of their head.  They aren’t called  “flaviceps” (Latin for “yellow-head”) for nothing.  But it’s not just yellow, it’s a very particular sort of golden yellow — slightly green and slightly gray, too, mustard, perhaps, and by some amazing biological coincidence, it’s exactly the color of Creosote blossoms, as if the birds used them to powder their heads.  The bird above is in a creosote bush (Larrea tridentata), and though most of the blooms have become white seed puffs, you can still see a few yellow flowers over the Verdin’s back.  They exactly match his head.  You can also see another colorful field mark, his sharp little chestnut epaulette.  Both the head color and the epaulette are vivid in the close-up image here (photo by T.Beth Kinsey, from the always excellent Firefly Forest).  Notice the narrow, sharp beak of a gleaner, rather than the sturdy beak of a seed-cracker.

As bright as these plumage features seem in photos, they are not always easily seen in the field, unless you’re equipped with binoculars.  So, many folks don’t notice this industrious little desert-gleaner working above their heads in their xeric yards.  What is very easily seen are the nests of Verdins — messy round stick-wads built in thorny trees and shrubs, often placed out towards the end of branches, to catch cooling breezes.  Verdin are prolific nest-builders, and often have a couple underway at the same time.  They build both breeding nests and roosting nests, and you might say they’ve got a complex nest-culture.  The male starts a sample nest which the female helps him finish, probably strengthening the pair bond.  Here’s a photo of an active breeding nest in our yard with noisy hatchlings in it.  The adult birds are hard to pick out, but the same little gray papa in the top photo is hanging in the “front door” along with the female — you have to imagine away the foreground branch of the Little leaf Palo Verde that’s blooming.  The nest is the wad of brown sticks against the blue sky, and the nest opening is at the bottom of the wad, which is where you can see the gray backs of the parents (click to enlarge the photo; it’s easier to see the birds). The low placement of the nest openings make them rain-sheltered and somewhat protected from larger winged predators.

The materials Verdin use for the exterior of their nests are the same ones Cactus wrens prefer for their own, so Verdin nests under construction in spring are often the focal point of theiving-and-chasing interaction between the two species.  In general, Cactus wrens seem to enrage Verdin, and the smaller birds will gang up on any wren they find in their area — nesting material isn’t the only thing Cactus wrens will snatch out of Verdin nests.

Verdins enjoy a variety of food sources besides gleaning bugs and larvae from foliage.  They take a sip of nectar now and again, and often hop around inside the stems of Chuparosa, robbing the sweet nectar from the base of the red flowers (they’re delicious — pop a whole Chuparosa flower into your mouth sometime; they taste like sweet cucumbers).  And we frequently see them hanging upside down from the hummingbird feeders, sipping the drips on the bottom after the sloppy Gila woodpeckers are through.  This acrobatic hanging upside down of Verdins is a family trait — they are the only North American representative of the family Remizidae, or Penduline tits.  Whatever that may sound like, it actually means little birds that hang upside down.

So, although the desert has no chickadees, we’ve got other little gray birds. ( And I haven’t even mentioned gnatcatchers, Bushtits, and Lucy’s warblers…)  But Arizona is not “dee-free”.  When we need a hit of chickadee or titmouse, we have choices — there is actually one more species of Paridae here than in the Midwest: Mountain chickadees in the high pine forests above the Mogollon Rim, Juniper titmice on the Colorado Plateau, the fantastic Bridled titmouse (yes, its ornate facial markings put the Plain titmouse to shame!) in the evergreen oak woodlands of the foothills and mountains of central and southern Arizona, and even a small population of Mexican chickadees in the Chiricahua Mountains of southeastern Arizona.  All we need to do is go uphill and it’s ‘Dee-a-Rama!

It was leaning, but not that much.  On Thanksgiving morning while we had breakfast (E, the M, and me), it fell with a huge thump from no particular direction. Later, E found the saguaro (Carnegiea gigantea): under the back mesquite, lying split like a toppled Doric column on top of beloved cax and sux, some in the ground, some in pots on shelves. Its weight had splintered a 2×12 pine shelf, cracking it nearly in two.  It popped a mature barrel cactus out of the ground roots and all, and launched pots in the air, so that they landed in uprooted piles.  It took all three of us to dig out the victims pinned under the wreckage, embedded in green flesh, impaled on spines.  Lots of crushed plants, but only two pots lost and only one hand-made one; a small clay “miracle”.  Still, it was gruesome, and the saguaro, although probably 50 years old, wasn’t anywhere near the end of its expected life span.  It hadn’t even grown arms yet, like some of the older saguaros in this mature desert neighborhood.

Pictures tell the story best.

In order to remove the plants from under it, we had to prop the saguaro incrementally up onto cinder blocks, where it now lies abandoned like an old car, awaiting decomposition, its length unnaturally separated from the soil below.  Sadly, as damaged as it is, it looks very whole even lying there, and a few of its roots, still buried in the damp desert soil, are so far keeping it green and living, a support system that won’t bring life back.

Every once in a while, I find a clay pot — a tiny, perfect clay pot — on the wall of the house.  They look like little half-buried Mediterranean amphorae, without handles, with a narrow neck and a flared rim, the entire thing only half an inch across.  But they have no openings: like the false-necked vessels drachmai-conscious Athenian families left at the graves of loved ones — they looked full of precious oil while only actually containing a thimbleful — these tiny pots are sealed at the top.  Sometimes, however, they have a hole in the side, as if a micro-tomb-robber struck the belly of the pot with a spade, to sift through the contents.

A little spadework in books and on the internet turned up the answer to who the tiny potters in our yard might be : Microdynerus arenicolus, the Antioch Potter Wasp, who builds up this mud cell for its offspring one mouthful of clay at a time.

You would think a wasp bringing mouthful after mouthful of mud to a wall right by the front door might be observed easily, but I’ve never knowingly seen one of these wasps on the job.  What I can glean about the appearance and habits of the Antioch Potter Wasp is that they are about half-an-inch long, live in California, southern Arizona and New Mexico, and are solitary wasps.  The adults have creamy white or yellow and black markings, and there are subtle differences in coloring and morphology between males and females that are probably mostly important to other wasps and entomologists.  (The photo on the left is not our Potter Wasp, it’s a related species from Australia.)  The females have stingers, but are “docile”.  They are also “domestic”: it’s the female who does all the housework.  Here’s what an Arizona Game and Fish document says about the Antioch Potter Wasp:

These are solitary wasps, each female constructing nests and provisioning them for her own offspring. Each nest looks like a small jug, about half an inch in diameter, with a short sealed neck. When the female decides to make a cell, she selects a sheltered place, and then carries dollops of mud there for construction. This is a precision process with a thin walled pot resulting. When the pot is almost completed, with just room for her to get her head in, she starts to provision the cell with hairless caterpillars, which she has paralyzed by stinging them in the central nervous system. Once the cell is full she lays an egg on the prey and restarts the cell making process. She adds mud to the edges of the nearly spherical pot. Closing the sphere presents problems that are solved by simply adding extra mud and leaving a small neck. The larva that hatches from the egg eats the prey, spins a cocoon inside the pot and pupates. When the new adult is ready to leave the pot, it simply makes a hole in the side and leaves. Using the neck would be logical but that is where the pot is the thickest.

–Arizona Game and Fish Department. 2004. Microdynerus arenicolus. Unpublished abstract compiled and edited by the Heritage Data Management System, Arizona Game and Fish Department, Phoenix, AZ. 4 pp.

Unless you’re a hairless caterpillar, this is a fascinating process.  Especially for a potter: the technique of building a pot from the bottom up, adding little bits of clay at a time, and contouring it as you go is exactly the technique potters use to build vessels or vessel-like sculptures.  Vessels of any size and shape can be made as long as the supply of moist clay holds out: the potter wasp makes her own by carrying a mouthful of water to a dry clay source and mixing it up to the right consistency and carrying it to the construction site.  To the right is a picture of a Three Star Owl VLO (Very Large Owl) being constructed in the same way as a potter wasp builds her nest.  (It will be more than two feet tall and at this point lacked its face.  Please note that the finished owl sculpture was not provisioned with hairless caterpillars nor were any eggs at all laid during the process.)

I determined to keep an eye on the little wasp-pot, hoping to see a new wasp break free and fly away, to carry on the work of potter wasps in the yard.  Of course, the next time I looked, there was the hole, and the empty belly of the tiny clay amphora — the wasp had flown.  Here’s a picture of the hole made from the inside out by the wasp itself, not a grave robber after all:

Etymology

The common name, Antioch Potter Wasp, seems like a very appropriately Mediterranean name for an organism that makes structures that look like amphorae, the storage and shipping vessels found all over the Mediterranean region from about the 13th century BC until the 7th century AD.  But it’s mere coincidence, and not connected with the ancient city of Antioch on the Levantine coast of the Mediterranean (the stretch of land from which the earliest amphorae, the so-called “Canaanite jars”, come), a hub of commerce and shipping.  The species was given its name from the town of Antioch, California, also a hub of commerce and shipping, where the type specimen was collected and described.

(Photos: #1, 3, 4, A.Shock, Three Star Owl.  #2, from the following site: http://www.geocities.com/brisbane_wasps/images/MudDau7.jpg, no photo credit found)

Here is a photo of a lovely Red barrel cactus in Miss Thang’s garden.

The barrel is happy where it is, and is growing quickly and healthily.  Unfortunately, we’ve had a Bermuda Grass invasion nearby, and despite E‘s manual, non-toxic efforts to control the grass, it’s spread up to the Red Barrel.  It was bad enough when the awful spikes of grass began to come up around the fat base of the cactus, but look closely — at about 3 o’clock on the shadowy right side of the barrel, there is a double spike of insidious grassy green poking out between the cactus’s ribs, inside the cage of the spines.  That is a Bermuda grass shoot growing out through the side of the barrel!  The horrid monocot grew around and under the cactus, and sent up sharp new shoots through its flesh and out its skin about 4 inches up from the soil line, where it’s now established itself contentedly at the expense of the barrel’s structural integrity.  I imagine roots spreading through the interior of the cactus, sucking moisture without remorse.

If you can stand it, here is a close-up, click on the image to enlarge it.

It turns the stomach.

Meet Miss Thang.  She is a female Costa’s hummingbird (Calypte costae), and unlike her purple-mustachioed male counterpart, she’s a plain green-gray above, and a plain gray-white below, with a chunky round body, almost no tail, and no neck at all.  She holds territory right outside our front door, as Queen of the Desert Garden.  The garden has many attributes valuable to a hummer: twiggy mesquites for roosting, a many-pointed DeSmet agave for perching, chuparosas with long-season blooms to feed upon, a freebie sugar-water feeder under the porch, and best of all, prime position from which to attract a showy male Costa’s who does looping, zizzing display flights for her each morning.  Although Miss Thang’s appearance is subdued, her personality isn’t.  She holds this valuable, resource-rich territory against all comers, including resident male Anna’s who are both brash and bigger, the summer tourists like Black-chinned hummingbirds, and any other hummers who may try to kype a slurp from the feeder.  The Gila woodpeckers are too big to chase off, and the Verdins seem to come and go with impunity, but other hummers at the feeder are given short shrift.  Speedy tail chases through the mesquite are frequent, although peevish scolding from a perch sometimes inches above the ground are often sufficient to rout invaders.  Her favorite perch from which to keep an eye on her real estate is a devil’s claw and obsidian wind chime, situated under the porch overhang directly outside the front door, shaded in the mid-day warmth, and dry in the rain.  At this time of year, when the door is open most of the day, we can see her perched alertly on the point of the devil’s claw for hours, spinning slowly as the chime turns in the breeze, chattering indignantly when another hummer flies through, or sallying forth to escort strangers right out of the yard.

Costa’s are desert hummingbirds.  They range from southern California, across the low deserts of Arizona, into Mexico.  The sources I’ve checked supply varying info about the yearly movements of Costa’s, giving an impression of the need for more research.  Some experts report they winter just south of our border with Mexico, others say the birds stay year-round in the low desert, some that they winter in the ‘burbs and breed in the less developed areas of the deserts; others just assert that their distribution is not well known.  In our yard in some years, Costa’s seem to be present in each month, with the largest number of individuals observed between June and December.  Some years they seem to disappear around the New Year and are scarce until late spring.  Now that we’ve packed the yard with hummer-friendly flowers (the photo above is Miss Thang’s demesne in full spring bloom) like chuparosa (Justicia californica), Mexican honeysuckle, (Justicia spicigera), Fairy dusters (Calliandra spp.), Desert lavender (Hyptis emoryi), native penstemons, various aloes, and sugar-water feeders, we seem to see more birds more of the year.

There’s been a female Costa’s hummer holding our front-garden territory year-round for at least two years.  We have no way of knowing for sure that it’s always Miss Thang, but of course it’s possible — it even seems likely.  We suspect she nests nearby — I’ve seen her gathering spider-webs in her beak — but have never discovered a nest. (Each year we do see young-of-the-year Costa’s in the yard, but we don’t know where they hatched.)

The yard also hosts glorious males, staking out other food-plant and feeder-related territories.  In past years, a Little-leaf Palo Verde was favored by a bird we called “Cornerhead” because his gorget went from scraggly sideburns to full-blown Yosemite Sam whiskers over the summer into fall. This is his picture on the right.  This year, there’s a long-mustached male (it may be Miss Thang’s suitor) under the pine/palo verde complex shading an outdoor table.  He “sings” (an almost inaudibly high-pitched descending sibilance) and gnats under the branches, keeping interlopers off the feeder there, then withdraws to the thorny interior of a nearby lemon in the middle of the day.  He “sings” from there, too, invisibly in the deep shade which is the only reason we know he’s in there.

Etymology…

…of the scientific name of Costa’s hummingbird, Calypte costae, is less than satisfying.  On the genus, Calypte, Choate, in the Dictionary of American Bird Names, can’t do any better than “Greek, a proper name of unknown significance”.  If he were alive, Gould could probably give a better explanation as to why he chose this genus for the bold Anna’s and Costa’s hummers.  I would suggest that Gould had in mind the adjective καλυπτή, from the verb καλύπτειν, to cover (with a thing).  The adjective means “enfolding”, connoting a veiled or mantled quality, possibly referring to the gorget that covers the entire crown and throat of hummers in this genus.  As for the species, costae, that was given in honor of Louis Marie Pantaleon Costa, Marquis de Beau-Regard, which early 19th century French nobleman had an “imposing” collection of deceased hummingbird specimens.  Merde, alors.

Photos: All photos by A. Shock, Three Star Owl.  The odd quality of the first photo of Miss Thang is due to the image being shot through an old-fashioned heavy metal security screen.

Here is an image of a Costa’s hummingbird mug from Three Star Owl.  The interior is a beautiful rich mulberry, the glaze color I can manage closest to the color of a male Costa’s gorget.

Saturday morning while walking through our neighborhood to the Park, E and I saw one of the local Gray Foxes. We didn’t have a camera! Too bad; it posed obligingly and let us admire it for quite a while: a beautiful, delicate zorro with a most magnificent tail.  It looked just like this:

Photo of Gray Fox by Patti McNeal

Desert Gray Foxes are quite arboreal: we frequently see them up mesquite trees and running along the tops of the block walls that criss-cross our neighborhood. They jump-climb the 6-foot walls easily, and also use them for somewhat coyote-proof napping eyries. Gray foxes rely on their subtle coloration to den out in the open — when they kip they coil up so that none of their black details show, enabling them, like owls, to hide in plain sight. The very first gray fox I ever saw was on a road embankment by the Mississippi River north of St. Louis: the fox was curled nearly invisibly in the thin winter grasses, right on the dirt about at eye level. As we drove past it on a gravel road it barely raised its head to look at us, but the movement revealed its dark eyes and “tear-lines”. If it hadn’t we never would have seen it.

I borrowed the photo above by Patti McNeal, who found this animal in Terlingua Texas. I’ve never managed a photo of a fox that’s any good, although I have been to Terlingua TX. Just for local interest, to the right is a photo I took, blurred and hard to see, of one of our local Grays napping on a neighbor’s wall in the dusk.

Etymology

Foxes are canids, but not Canis, the genus of dogs, wolves, coyotes, and jackals. The Gray fox has its own genus: Urocyon, which is from Greek ὀυρά, tail, and κύων, dog. Its species is cinereoargenteus, from Latin cinis, ash, plus L. argenteus, of silver. Put them together, and its name means “silvery ashy-black dog-tail“. In case you’re wondering, the genus of the Red fox and other “true foxes” is Latin Vulpes, meaning “fox”, which does NOT give us our word “fox.” That is said to be derived through Old English from Old German fukh (the modern German word for fox is fuchs), derived from the Proto-Indo-European root puk- which means “tail.”

Terlingua Texas in 1936, NPS photo by George A. Grant

A couple of mornings ago, we saw our first Cooper’s hawk of the season, swooping nimbly around the big backyard mesquite in an unsuccessful attempt at snagging a dove or finch from the feeders under the tree. It lit on the utility pole in the alley and, having an itchy face, primly scratched itself with a big, bird-catching foot.

Cooper’s hawks (Accipiter cooperii) are accipiters, a group of bird-eating hawk species characterized by medium to small size, spry flight (the better to capture other birds with), short rounded wings and a long tail useful for steering in flight. They inhabit a broad geographic area primarily in the lower 48 states, and a wide range of habitats, including temperate woodland, mesquite bosques, cottonwood stream-sides, as well as neighborhoods and parks. Cooper’s hawks are the most frequently encountered accipiter in Arizona.

If you put out a bird feeder for songbirds, you’re also feeding Cooper’s hawks (and their smaller relative, the Sharp-shinned hawk). Not because they eat seed, of course, but because they eat seed-eaters, like the finches and sparrows that stuff themselves at well-stocked feeders. Our yard hosts Cooper’s hawks most often during migration and in winter, when they lurk inconspicuously in the lower branches of trees, waiting for unaware prey to come within range. All accipiters are capable of tail-chasing smaller birds skilfully through foliage, and take prey either on the ground or in mid-air (see fierce foot above). It’s not uncommon for us to find a Cooper’s hawk under the canopy of the big mesquite on a chilly winter morning with breakfast in its fist, or a feather pool on the ground under where one has roosted and plucked its meal. They favor avian prey, but will take anything they can get, including rodents, invertebrates, reptiles, etc.

Although the strong early morning light in the upper photograph makes it difficult to see, the reddish barring on our recent hawk’s breast and belly means it’s an adult; an immature would have brown dots and streaks instead. Its gray back shows it’s a male; the larger females are brownish above. Cooper’s have fierce red eyes and beetling brows, which give them a “You talkin’ to me?” sort of look.

Photos: top, E. Shock. Right: a very clear photo of an adult Cooper’s from T. Beth Kinsey’s Firefly Forest showing an excellent assortment of field-marks for the species: contrasting dark cap, red barred breast, bright yellow legs and barred tail with relatively wide white terminal band.

Etymology

In Latin, accipiter means “hawk”, from the verb accipere, which means “to take” as in “taking prey”, like the word “raptor”. The species name, cooperii, is named after ornithologist William C. Cooper (1798-1864), a New York scientist who described the Evening Grosbeak.  In places where their ranges overlap, such as northern Arizona and New Mexico, a Cooper’s hawk would love to eat an Evening grosbeak.