Getting through the winter here means finding food in harsh
times with limited sources of survival. The species photographed recently at
Halibut Point have adapted to dietary strategies mostly other than berries. The
descriptions of their eating patterns come from the All About Birds website
of Cornell University's Ornithology Lab.
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White-breasted
Nuthatch on a tree trunk |
White-breasted Nuthatches eat mainly insects....
They probe into bark crevices or chip away at wood to find food. When they find
large nuts and seeds, they jam them into the bark and hammer them open.
White-breasted Nuthatches often store seeds and insects one at a time, and
somewhat haphazardly, under loose bark on their territory. They typically hide
the food by covering it with a piece of bark, lichen, moss, or snow.
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American Tree Sparrow gleaning a field |
Winter is the time to go looking for American
Tree Sparrows. Despite their name, you'll probably find them foraging on the
ground rather than feeding in trees....From fall through spring, they're almost
exclusively vegetarian, eating grass, sedge, ragweed, knotweed, goldenrod, and
other seeds, as well as occasional berries, catkins, insects, insect eggs, and
larvae. In settled areas, they happily eat small seeds from feeders—including
millet scattered on the ground.
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| Common Redpoll consuming seeds from birch catkins |
Common Redpolls [an uncommon sight at Halibut
Point] are active foragers that travel in busy flocks. Look for them feeding on
catkins in birch trees or visiting feeders in winter. These small finches of
the arctic tundra and boreal forest migrate erratically. Winter diet is largely
birch and alder seeds.
 |
Greater Scaup in the Halibut
Point quarry |
Greater Scaup eat aquatic invertebrates such as
mollusks, insects, and crustaceans at the bottom of lakes and bays as well as
aquatic plants, insects, and seeds.
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Scaup diving |
To capture aquatic invertebrates in soft muddy
substrates, scaup stick their bill into the mud and quickly open and close it
while swimming forward. They tend to forage in waters less than 7 feet deep,
but can forage and dive up to 23 feet in deeper water.
 |
Purple Sandpipers
foraging at the shoreline |
Purple Sandpipers breed on arctic tundra; they
spend winters on North Atlantic shores, farther north than any other shorebird.
Purple Sandpipers forage most heavily during falling tides....eating creatures unfamiliar to most people such
as mussels, periwinkles, sea snails, worms, and small crabs and other
crustaceans. —and indeed many of their prey items have only scientific names.
They stand or walk slowly on rocks, searching for prey visually or simply
inserting the bill into algae or wrack to detect prey by touch or taste. Often,
they probe between barnacles or mussels for small prey items.
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Peregrine Falcon perched
on a promontory |
Powerful and fast-flying, the Peregrine Falcon
hunts medium-sized birds, dropping down on them from high above in a
spectacular stoop. Peregrine Falcons eat mostly birds, of an enormous variety—450
North American species have been documented as prey, and the number worldwide
may be as many as 2,000 species. They have been observed killing birds as large
as a Sandhill Crane, as small as a hummingbird, and as elusive as a
White-throated Swift. Typical prey include shorebirds, ptarmigan, ducks,
grebes, gulls, storm-petrels, pigeons, and songbirds including jays, thrushes,
longspurs, buntings, larks, waxwings, and starlings.