The southern woods in mid-summer keep their secrets well. The
mingled leaves of oaks, hickories, tulip poplars and maples form
a shifting green canopy that fractures and confuses the sunlight.
Sycamores and river birches shroud furtive creeks. Dogwoods, box
elders and paw-paws spread out through the understory, and the
vines of fox grape, poison ivy, honeysuckle, trumpet creeper and
greenbriar ramble and slither and twist up trunks and over fallen
branches. The heavy foliage disguises and obscures much of what
goes on here, and the heat, humidity, bugs, spider webs and thorns
help create a prickly and wary atmosphere.
So that's my excuse - though it's not a very good one. A more experienced
birder would have recognized the distinctive call of a broad-winged
hawk immediately. But I have to admit that it was several weeks before
I identified the elusive, high-pitched whistle that sounded as if
it came from a small bird impossibly hidden somewhere among the tangle
of leaves and vines. It didn't sound like a hawk. And while broad-winged
hawks are not uncommon in much of eastern North America, they were
not commonly known to nest in the woods of Oconee County, Georgia,
where I found them in the summer of 1998.
My husband and I lived then in a rural part of the county where
second-growth forest spread over fairly large areas of former farmland.
Our own 16 acres sat deep in the woods, bordered by a creek that
flowed into a series of beaver ponds. Around us, clearing and construction
had begun on at least four new subdivisions, which meant the character
of these woods would change dramatically in a short time. It also
meant that this place was like many others in this part of the South
today, where woodlands are rapidly being replaced by suburban development.
The broad-winged hawks I found and observed over a period of two
summers are one example of what we're losing as these woodland communities
disappear. Beautiful and in many ways mysterious birds, Broad-winged
Hawks nest in forests throughout the eastern part of North America,
yet many aspects of their lives remain unknown. They are, at the
same time, common and widespread, but quiet and little noticed in
their private, day-to-day lives - a paradox they share with these
southern woods.
The first young hawk I saw, tucked back on a low branch of a pine
behind a screen of green needles and flickering shade, could easily
have escaped my attention if things had happened a little differently,
so well did it blend, in every way, with the woods around it. On
a warm, quiet morning in July, a little after eight o'clock, I had
come out for a walk on the edge of the woods. I followed our driveway,
a rough dirt and gravel pair of tracks that gradually wound uphill
through the woods for about half a mile. Soft, thin white clouds
drifted across a pale blue sky. Cicadas sang. The summer had been
hot and dry. Brown and yellow leaves already splotched the tulip
poplar trees. Hundreds of dandelions speckled the weedy strips of
grass along the driveway with pinpricks of gold.
I passed through a sunlit section of water oaks, pines and sweet
gums. Behind them the taller, denser hickories and white oaks shimmered
in a haze of wet heat. Although the morning had seemed quiet when
I first came out, as I walked I became more aware of the sounds.
I heard the dry WHEET-sit of an Acadian flycatcher from deep in the
woods; the sweet, insistently repeated song of a red-eyed vireo;
the chatter of titmice and chickadees. The hum and buzz of bees,
wasps and flies. The distant caw of a crow. The hammers and radios
of carpenters at work on another new house not far away through the
woods.
When a large hawk emerged from the treetops ahead of me, I paused
and watched as it rose, working its way up quickly, and began to
circle. Another hawk flew in and joined it, and together they climbed
higher and higher. I assumed they were red-shouldered hawks, a familiar
resident of these woods, and watched them only casually until they
disappeared from sight. If anything about them looked different or
not quite right at the time, I shrugged it off - and saw what I expected
to see.
I walked on up the hill. It was getting hotter. Sweat began to run
down my neck. Red ants swarmed over the green carcass of a small
grasshopper lying on the hard red dirt. A sleepy orange butterfly
passed by, and a dusky, tattered black swallowtail. A rabbit startled
me by suddenly breaking and running through the grass and into a
mass of shrubs. I hadn't gone far before the two hawks returned,
flying low and quietly, and settled into an area of pines, where
I spotted one of them and was able to approach close enough to see
it well.
It sat on a low branch, facing me and lightly screened by a haze
of green needles, melting beautifully into the shadows. This time,
it was not what I expected to see. Though small compared to a red-shouldered
hawk, it looked strong, stocky and powerful, with a comfortable,
confident demeanor. It did not seem disturbed by my presence. The
most striking thing about its appearance was the dramatic contrast
between its expansive, creamy white breast, with only a few dark
brown streaks on the sides, and a chocolate brown back, wings and
head, with faint barring on the dark-brown wings. The chin and neck
were white, with one dark mark under the center of the chin, and
dark crescent-shaped markings like sideburns. The tail showed narrow
bands of dark and light. As I watched for several minutes, it turned
its head from time to time to look one way or the other, with fierce,
frowning eyes and hooked beak.
Then it opened its bill and called in a surprisingly high, thin,
strained-sounding whistle, peee-eeeeeeeee. It was answered by another peee - eeeeeeeee from not far away. I realized then that this was
the source of the calls I had heard frequently during the last few
weeks, and had been unable to identify, though it wasn't until I
got back to the house and checked my field guide that I was sure
- they were broad-winged hawks. The one I had seen most closely,
with the white, unstreaked breast, was a juvenile. The other might
have been another young hawk, or one of the parents.
Broad-winged hawks are relatives of our more familiar red-tailed
and red-shouldered hawks, but smaller and more compact in shape.
A mature broad-winged hawk has dark brown wings and back, a breast
with dark reddish-brown barring, and wide black and white tail bands
that are most obvious in flight. Their distinctive high, thin whistle
is easily overlooked or mistaken for the call of a smaller forest
bird. They're best known among birders for their spectacular migration
flights, especially in the fall, when thousands and sometimes tens
of thousands of broad-winged hawks congregate and move together toward
their winter homes in Central and South America. During their summer
breeding season, however, they are the opposite of social or flamboyant.
Field guides and life histories describe them, during the nesting
season, as secretive, retiring, rather docile birds of the deep woods.
They nest, hunt and raise their young quietly in the forests of eastern
North America, and because of their reclusive habits, are seldom
noticed.
To me, the broad-winged hawks are a vivid illustration of how little
I often see of the natural world right around me - and of how much
I miss. How many times had I walked right past one, perched on a
branch only a few feet away? How many times had I heard their calls
without recognizing them or even trying to identify the source? I
just didn't look. For the rest of that summer, I didn't often see
them, but I heard the calls of the broad-winged hawks almost every
day. I came to realize that their high, thin whistles, elusive and
subtle, with an almost fairy-like quality, were almost always there,
weaving through the fabric of the woods like a needle, pulling one
of the thousands of gossamer threads that held it all together.
I heard them most often in the woods about a hundred yards east
of our house, in a densely tangled area of hickories, oaks, sweet
gums, and heavy undergrowth. The terrain was low and often wet there,
with a lot of gullies, vines, briars and poison ivy. I suspected
that they might have a nest in this area, but didn't try to find
the spot. I also frequently heard them in an area we called the wetland,
which was where our small creek ran into a series of beaver ponds,
home to an abundance of frogs, turtles and insects - undoubtedly
one of the hawks' favorite hunting spots, and probably one of the
main reasons they nested nearby.
Broad-winged hawks hunt from a perch for insects, amphibians, reptiles,
mammals, and birds. Their method of hunting is often described as "cat-like," as
in this excerpt from a monograph published in 1911 by F.L. Burns:
"The rather sedentary Broad-wing most frequently waits for
its prey while perched on a convenient stub or dead limb. A slight
stir below and it bends forward with dilating pupils, cat-like, with
twitching tail, swaying body, light foothold it springs forward with
marvelous quickness, snatching up the object with its talons; if
its captive is not too heavy it carries it to one of its favorite
perches, there to devour it unless disturbed, when it reluctantly
retires after a whistled protest."[1]
Broad-winged hawks will eat a wide variety of prey, depending on
what's available, including mice, rabbits, squirrels, chipmunks,
several kinds of birds, snakes, toads, lizards, crayfish, moths,
dragonflies and earthworms. They are said to be particularly fond
of reptiles, amphibians, and the larvae of some large moths. They
are known to sit for long periods of time in the same place, so patient
and unhurried that they've even been described as "sluggish."
A.C. Bent, in his Life Histories of North American Birds
of Prey, describes them as gentle, unobtrusive, and unsuspicious. "It
is the tamest of all the hawks," he says. "One has no difficulty
in approaching it as it sits on some low limb in the woods calmly
watching the intruder with apparent indifference. If forced to fly
it flaps along through the trees, much after the manner of an owl,
and alights again at no great distance."[2]
Bent goes on to add, however, that a Broad-winged hawk is "far
from sluggish in its soaring flight," and while I've never witnessed
the spectacle of Broad-wings in migration, I was lucky enough to
see some glimpses of this side of their lives. One morning in early
August, a warm, restless wind rushed through the heavy green foliage
of the hickories and oaks in our woods, dry from several weeks of
heat and not much rain. The sky was burning blue and thick with big
white clouds, many of them gray-bottomed, drifting swiftly south.
A few cicadas rattled, and I heard the voices of titmice, blue jays
and Carolina wrens, and the whirr of a red-bellied woodpecker as
I headed out for a walk before lunch. Grasshoppers sang in the weedy
patches along the edges of the woods.
I heard the calls of a juvenile
broad-winged hawk before I saw it, sitting in a tall, thick old pine,
and crying over and over, plaintive and insistent. I could hear no
answering call, but the young hawk spread its wings and left the
trees, lifted by the strong wind. It circled directly over me, then
began to climb, continuing to call several times a minute. It circled
up and up, banked a little awkwardly, then sped downwind, breathtakingly
fast, and disappeared out of sight. It wasn't long before I saw it
again, circling and climbing, soaring up among the towering clouds,
and then plummeting down again. All the while, the young hawk never
stopped crying.
After four or five minutes of flight, it returned to its perch in
the same pine. It rested for a few minutes, then flew again, circling
up as before, and this time it was joined by a second hawk, with
a reddish breast and wide white band in the tail that identified
it as an adult. For several minutes I stood, watching them soar and
dive and swoop, until my neck hurt from leaning back. They swept
upwards until they were hardly more than specks against the big white
clouds and deep blue sky, then they came streaking down fast, wings
tucked back, leveled off and circled around low for a while before
lazily climbing back up again. They continued to exchange high, shrill
whistles, which were distinct and audible even when the birds were
so high they were almost out of sight, though if I had not been aware
of them, the cries could have escaped attention altogether. The adult
called in a three-syllable cry, with the accent on the third syllable
- pee-a-eeeee, pee-a-eeeee. The juvenile cried peeeee-eee, peeeee-eee,
peeeee-eee, with the accent on first syllable, raspy and even higher
in pitch than the adult. Abruptly, both were gone, flown off in the
wind. This time they did not return, and the woods seemed suddenly
quiet and empty.
Much later, I read a description of the flight of a family of broad-winged
hawks observed in 1926 by a Mr. Shelley, who is quoted by A.C. Bent: "They
resembled more than anything else a batch of dry leaves lifted and
tossed and whirled on a zephyr of brisk autumn wind,"[3] he wrote,
and his description captures better than my own words the spirit
of the flight I watched. It was a spectacular display of flying skills
- and maybe of a young one learning from its parent - performed with
what appeared to be joy, an easy command of the air, and a communion
with the wind. I knew better than to make any assumptions about what
the birds might be feeling, but I couldn't help imagining. Going
from the quiet, leafy, dim retreats of this rough little patch of
woods up into the open sky and among the clouds, and back again -
these birds owned the best of both heaven and earth, I thought.
Sometime in late August or early September, they disappeared completely,
gone to spend the winter in Central or South America. I don't know
exactly when the breeding pair returned the next year, or even if
they were the same pair for sure, or where the juvenile might have
gone. All I can say is that on a warm, humid morning in mid April,
two broad-winged hawks announced their presence in spectacular fashion.
I had just stepped outside to check out the morning before settling
down to work in my office. The spring sky was blue, but restless
with big gray and white clouds. Overnight, a strong wind had blown
down dozens of the showy blossoms of tulip poplars. Blooming dogwoods
still laced the woods, and the songs of warblers, vireos, tanagers
and wrens surrounded me. A pair of phoebes were hunting near the
nest they had built on a ledge at the peak of our roof.
For the first time in several months, I heard the whistled calls
and looked up just as two broad-winged hawks came swooping down very
low over the small clearing around our house, calling as they flew,
then soaring up and around, just over the treetops, making several
passes and flying directly over me again and again. The sunlight
filtered through the wide white and black bands of their tails, intensified
the deep red streaking on their breasts, and gleamed on their broad
brown, outstretched wings, which were pale and almost silvery underneath.
I laughed with the sheer exhilaration of standing under them as they
flew over and around, and with delight, because I had hoped they
might come back.
It seemed to me that they were checking out their old territory
that morning and reasserting their control of it, but I don't really
know. It's possible they were engaged in a mating flight. Little
seems to be known for sure about the mating behavior of broad-winged
hawks. The species account in Birds of North America says that their
pair formation has been little studied. They are thought to be monogamous,
but further study is needed.[4] Bent speculates, "As this and
other Buteos are probably mated for life, the lovemaking is largely
expressed in nuptial flights in which both birds flap or soar in
small circles, frequently passing close together and occasionally
darting down at one another in a playful mood."[5]
For the next two or three weeks, the hawks flew low over our house
several times every day, and I think it's likely that during that
time they began nesting. They probably were flying back and forth
between their nest and the beaver ponds, collecting nesting material
as well as hunting for food. The nests of broad-winged hawks may
be built in either deciduous or coniferous trees, usually lower and
in smaller trees than those used by red-shouldered hawks, with which
they often share a breeding area. Although they appear to return
to the same territory year after year, they usually build new nests,
rather than reusing old ones. Both members of the pair help construct
the nest, but the female does more of the work. The nest is built
of dead sticks and fresh twigs, and lined with bark chips and other
materials, such as "corn husks, moss, inner tree bark, red cedar,
wild grape vine, lichen-covered bark, chicken feathers, or pine needles."[6]
The most interesting detail about the nests of broad-winged hawks
is that fresh green sprigs are brought to the nest almost every day,
beginning soon after construction begins and continuing for the entire
nesting period.
Bent, quoting a Dr. Gibbs, says, "An almost invariable custom
of the Broad-wing is that of placing sprays of fresh green leaves
and sometimes blossoms, of the chestnut, oak, poplar, maple, wild
cherry, basswood, cottonwood, elm, pine, spruce, hemlock, balsam,
and in one instance, evergreen vine and swamp grass, in the nest,
under and around the eggs or young. . . it is frequently renewed.
The sprays are broken from the tops of trees and carried to the nest
by means of the beak."[7]
[1]F. L. Burns, "A monograph of the Broad-winged Hawk (Buteo platypterus)," 1911. The Wilson Bulletin, Volume 23, Nos. 3 and 4, pages 146-320.
[2]Arthur Cleveland Bent, Life Histories of North American Birds of Prey, Part One, 1937, page 246 in the 1961 Dover edition.
[3]A.C. Bent, page 246.
[4]L.J. Goodrich, S.C. Crocoll and S.E. Senner, 1996, Broad-winged Hawk (Buteo platypterus), The Birds of North America Online (A. Poole, Ed.) Ithaca: Cornell Lab of Ornithology.
[5]A.C. Bent, page 238.
[6]Goodrich, Crocoll and Senner, The Birds of North America Online.
[7]A.C.
Bent, pages 240-241.
Copyright © 2009 Sigrid Sanders| All Rights Reserved