Held Breath

These are the dog-days of August, the lull between the high activities of summer proper and the fall semester looming ahead. Usually, these are hot and even sultry days, but this year we awaken to leaden, fog-cold mornings and wait impatiently, bundled in sweatshirts, wool socks and fleece, for the heat of short afternoons.

Slow, even listless days. The very air is still; the campus silent with quietness of a held breath. No students chattering in the courtyards or calling across the quad; no bustle as throngs troop down the hallways, no lines (savor that!) at Charlie’s or Toast; no bands blaring at noon.

Walking along Salazar Hall, I miss the squeaky, buzzy swallows, their mud nests for the most part empty except the few hardy couples double-clutching, raising a second brood. The rest of the swallows, oldsters and youngsters, have decamped to begin the long trek to South America for the winter. Midday, I take the path over the little knoll to sit on a wide bench at the top edge of the Alumni Amphitheater grove just as the fog thins to blue. I welcome this lull, this silence, this held breath. Even the poplar trees are merely whispering in the faint occasional lackluster stirrings of air.  

Juv. Cooper's hawk, photo: Becky Olsen

All last month, though, this small grove of poplar, pine and oak, was a noisy nursery for a clutch of Cooper’s hawk (Accipiter cooperii) fledglings. Becky Olsen in Financial Services had been keeping an eagle (ooops) eye on the nest since mid-spring, when a pair of hawks had taken up residence the large oak. One day last May, on a bird walk about campus, she took several of us to the south side of Salazar.  “Stand right about here, “she said, directing our binoculars to the top of the majestic oak, “look into the middle of that dark section there.” And there it was, a very large collection of sticks and twigs, the work of several seasons. Truly, if you did not know the nest was there, it wasn’t.

After that, I planned my walk-about routes to pass by it.  Several times, I saw the swoop of a parent hawk, mostly brown from my viewpoint, bringing tidbits to the nest. And every so often, I would see one perched on the branches of nearby trees, as still as could be. And then, in early July, I saw a fuzzy, white something poking over the edge of the nest: hatchlings!

Juv. Cooper's Hawk. Photo: Becky Olsen

By mid-July, they were fledglings and were hopping around the branches of the oak (known as branching); then, as they got the hang of flight, in nearby trees. And not just one, three! Quel surprise! Each day, they flapped a bit further, all the while begging keee!kee!keee! for tasty morsels. The parents were having a time of it, reminding me of the endless grocery runs when there were teens in my house. The Cooper’s hawks certainly picked their nest-site well. Their market is right next door, under the eaves of Salazar,  for the main prey of Cooper’s hawks are small birds, though they are willing to vary their diet with little mammals and lizards if the opportunity presents itself, or if necessary.

The Cooper’s hawk is one of three species of Accipiters, the long-tailed, blunt winged, forest-dwelling group of hawks. They are swift, agile birds, designed to dodge through trees after their flying prey. Elegant and dignified in adulthood they are, with a slate-gray back (lending them the nickname big blue darter), ruddy-brown and white ribbing underneath and bright red eyes-though I have yet to see those with my own peepers. The young begin as those outrageous white puff balls that morph into yellow-eyed juvies, with barred brown-and-cream plumage

It’s thrilling to see these hawks on campus; they are every inch dignified and regal birds. And they have skirted the edge of extinction several times. They were once the bane of farmers, who thought they were drawn to chickens (thus dubbed “chicken hawk”) and thus hunted to dangerously low populations in the late 1800’s. In the mid-1900’s, they (along with so many other birds of prey), suffered from the ravages of DDT, which led to fragile-shelled eggs and the loss of several generations. Now they face loss of habitat as the wild woodlands are leveled or logged.

But they are doing their best to adapt. Once considered reclusive, to be found only it forests far from human habitation (gee, I don’t know why) Cooper’s hawks have been seen scouting and snacking at suburban bird feeders and even in urban parks.  So it’s not that surprising that they nest here, in this park-like setting, with a ready supply of swallows, and people who leave them alone.

And though the bird-parents are done for the season, resting on their laurels, enjoying the peace and quiet, we will be faced with all the human fledglings, due to arrive in a week. Maybe they'll bring some hot weather with them.

more details on Cooper's hawks:

http://www.allaboutbirds.org/guide/Coopers_Hawk/id

http://en.wikipedia.org/wiki/Cooper's_Hawk

http://www.wbu.com/chipperwoods/photos/coophawk.htm

Bird Walking with Becky Olsen

One of the long-lasting effects from the last Staff Appreciation Day were the extra lunch-hour workshop sessions held over the year. One such was the Bird Walk led by Becky Olsen from Financial Services about two weeks ago. She's an experienced, excellent and enthusiastic birder who has been keeping an eagle (sorry) eye on birds in, around or flying over campus for fifteen years or so. She told us, as we gathered on the north patio of the commons, that she's seen over 100 different species of birds on campus during those years including resident birds, temporarily resident (wintering over or here for the breeding season) and migratory birds, aka "fly-overs." She's also been a long-time volunteer at the Bird Rescue Center for Sonoma County.

Becky led our merry (though shhh! quiet!) band of five from the commons along the paved path toward the creek. We stopped by the palm trees near the pond, looking for a hooded oriole, a bright yellow bird that I'd never seen before and didn't then either. (But I did on the walk back, thanks, Becky!) Just before the walking bridge, we took a jog to the west to watch a family of chickadees flit around some low bushes -- actually, the parents flitted around while the three or four kids (they all moved too fast to be counted) clutched skinny twigs and begged: dee, dee, dee, dee!

Chestnut-backed chickadees (Poecile rufescens) are plucky year round residents, living, breeding and raising their kids in the heart of Wine Country and on our campus. They are active, inquisitive, chattery, amusing little critters, about 4.5 inches long on a good day, feeding on insects when they can get them and seeds when they can't. In the fall, they'll cache seeds, storing them against the meager fare of winter. It's been estimated that one chickadee can hide and remember up to a hundred thousand seeds in a season. Bird brain indeed! I can barely remember where my 10 keys are at any given time and they're all on the same ring.

During the fall and winter, when chickadees cache and retrieve seeds, the hippocampus of their little birdy-brains expands; in spring and summer, when they no longer need that info, it shrinks down to normal. Certainly gives credance to the motto "use it or lose it," as it applies to brains. Time to break out the crossword and jigsaw puzzles, folks, take up a new language, find that guitar in the back of the closet and take lessons again.

There are seven species of chickadees in North America: Black-capped, Carolina, Mountain, Boreal, Mexican, Grey-headed and our Chestnut-backed, with little overlap in territories. Most are various arrangements of grey, black, buff, russet-red and white. Ours sports a dapper chestnut-colored back and flanks, appearing at times to wear a very dashing suit coat with grey sleeves, or perhaps a tasteful russet-hued vest for the holidays. With strong legs and feet, chickadees often hang upside down as they forage, which is somehow quite endearing. They are perching birds (passerines) and quite social in nature, existing in loose flocks of several chickadee families, as well as in mixed foraging flocks composed of warblers or bushtits. They often share territory with downy woodpeckers and nuthatches. But for all their tiny size, they are spunky and not easily intimidated; they've been known to mob predators such as owls or hawks.

Chickadees are cavity-nesters, often commandeering old woodpecker holes in trees. As our small birding band backtracked east and wandered along the creek toward the butterfly garden, Becky pointed out a snag -- an old, mostly leafless, tree trunk leaning over the creek. Near the top was a nice-sized round hole and within moments, a chickadee had flown into it and then after a bit popped out, flying off immediately. "Babies are still in there," Becky said, "hungry babies." Within the hole, there might be a nest similar to the photo below (courtesy of the Cornell Lab of Ornithology), moss and strips of bark providing structural support on the outside, soft animal fur, hair and even feathers, providing coziness on the inside.

Fascinating to think that while we're busy in our offices and class rooms, contemplating numbers and philosophies, examining theories and texts, balancing budgets and signing contracts, these little chickadee families are thriving in the bushes and trees along our fringes, hatching and raising their youngsters, teaching them how to find tasty bugs and save seeds, how to evade predators, how to sing, find a mate and thrive.

Everywhere you look, brains are working, critters are learning.


More links for thought:

Madrone Audubon Society
Hiding seeds, Black-capped Chickadees
Hippocampus and the Chickadee
Cornell Lab of Ornithology

An Erratic Week in an Aberrant Spring

After a weekend of stunningly perfect weather (bright blue skies, mild wind, brilliant sun), last Monday arrived cold and rainy, a thick sky of grim nimbus clouds and a wind too full of itself. Cloudburst, downpour, sprinkle, drizzle, rinse, repeat. The view out the office window was grey, grey, grey, all day. Still, not much daunts the intrepid Amateur Campus Naturalist and so, jamming the hat down to my ears and cinching tight all openings of the raincoat, out I went. Sticking to a route under overhangs and close to trees, I avoided becoming completely drenched while freshening my lungs with oxygen-rich air. Win, win, win. At least for me.

We're not used to this sort of wet and variable spring in Sonoma County. All this cold rain and dreary grey feels more like epileptic relapses into winter. April showers bring May flowers in other parts of the country. Here, the ultra-pleasant and dry weeks of April merely launch us full-tilt into summer; by mid-May, telltale patches of brown will line the crests of the hills as the winter rains recede into the water table. This spring though, with rains every other week, the hills are staying green, and with rainfall totals above normal, the three-year drought has been conquered. (Fingers crossed on that one.)

Walking just inside a silvery curtain of rain under the Salazar overhang, I wondered where the cliff swallows hide in all this wet. The birds had arrived per usual in mid-April, with their radio-static buzzy clicks, swinging freely over the quad in waves, then winging over the playing fields, scooping up their bug lunches. Certainly nest building has suffered from rain delays; under the eaves high above, I could see only the most rudimentary lines of daubed mud sketching in the nest foundations. How will this affect raising and fledging the next brood?

From Salazar, I hopped, skipped and skidded around the gym and up into the Kenneth Stocking Native Botanical Garden. Under the tree-canopy, the rain was but a minor nuisance. I wandered along the spongy floor of dense leaf-litter and needles, breathing deep, the air fragrant and damp, and stopped to watch through crossed tree branches as the lessening rain dimpled the pond. Suddenly I heard dee! dee dee dee! dee! shockingly close to my head. I spotted the commotion right away:  two spry chestnut-backed chickadees bouncing around the branches and twigs just above me, gleaning insects and bugs as fast as they could to feed their fluffy, demanding, just-fledged progeny, three lumps-on-a-branch, barely moving, except to open their beaks for food or to dee! deee! deee! for more.

Obviously, this aberrant spring has had little effect on these adorable (admit it, they are) little busybodies.   And it probably won't do more than slow down the swallows as they follow the inevitable course of actions leading to the next generation. Nor will it interfere with our own about-to-fledge graduates who, in about two weeks, will fling up their black caps, tassels and all, and come rain or come shine, fly on.