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Raptor Species
Cooper's Hawk
Accipiter cooperii
Taxonomy:
Class: Aves
Order: Falconiformes
Family: Accipitridae
Subfamily: Accipitrinae
Genus: Accipiter
Length: 14-16 in. (male); 16-19 in. (female)
Weight: 10-14 oz. (male); 17-24 oz. (female)
Wingspan: 28-30 in. (male); 31-34 in. (female)
Common Names: blue darter, chicken hawk
Etymology: accipiter (Latin) - "birds of prey"; cooperii - after William Cooper, an ornithologist
Description: The Cooper's hawk is a short-winged, long-tailed
forest-dwelling raptor. Cooper's hawks closely resemble the smaller
sharp-shinned hawk,
but can be distinguished by the curved tip of the tail with broad white terminal band compared
to the squared tip on the tail of the
sharp-shinned hawk.
Cooper's hawks have a larger, squared head emphasized by its tendency to raise its hackles. The head
projects far beyond wrists on a gliding bird, and they have five notched primaries. Cooper's hawks eyes
look smaller in the head than sharp-shinned hawks.
Flight: Active flight with stiff, strong wing beats. Typical
flight pattern for accipiters is flap, flap, glide - flap, flap, glide. They will surprise
prey with a low, swift dashing flight, and have been known to drown prey with a convulsive
grip. Will soar with dihedral or flat wings.
Voice: Around the nest, a rapid kek, kek, kek, suggestive of a flicker.
Habitat: Cooper's hawks are forest-dwelling raptors. Their
preference for forest habitats makes them more difficult to spot, but they will usually
soar for a period of time each day. Cooper's hawks are seen in increasing numbers while
sharp-shinned hawks
are declining due to habitat. Cooper's hawks will nest in fragmented woodlands, while
sharp-shinned hawks won't.
Distribution: Cooper's hawks are common to uncommon in their
breeding range, which is most of United States and southern Canada, except southern Florida and
northern Great Plains. Northern birds are migratory.
Nesting: Usually builds a new nest of sticks and twigs each year.
Nest is usually lined with flakes of bark and sprigs of green pine needles. Lay 4-5 eggs.
Incubation lasts about 30-32 days and is shared by both sexes. Male brings sticks, female
arranges nest, in crotch of tree or on top of squirrels nest in dense canopy. Lays eggs
every other day but eggs hatched within three days.
Food: Main food is birds and small mammals.
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