Cooper's Hawk (Accipiter cooperii)
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The Cooper's Hawk (Accipiter cooperii) is a medium-sized hawk native to the North American continent and found from Canada to Mexico.
As in many birds of prey, the male is smaller than the female. The Birds found east of the Mississippi River tend to be larger on average than the birds found to the west.
Cooper's Hawk was first described by French naturalist Charles Lucien Bonaparte in 1828. It is a member of the goshawk genus Accipiter. This bird was named after the naturalist William Cooper, one of the founders of the New York Lyceum of Natural History (later the New York Academy of Sciences) in New York.
Other common names; Big Blue Darter, Chicken Hawk, Hen Hawk, Mexican Hawk, Quail Hawk, Striker and Swift Hawk.
The average size of an adult male, at 312 g (.69 lb), 39.37 cm (15.5 in) long and has a wingspan of 71.12 cm (29 in). The adult male is significantly smaller than the average female, at 500 g (1.1 lb), 45 cm (17.7 in) long and has a wingspan of 83 cm (32.67 in).
All have short rounded wings and a very long tail with dark bands, round-ended at the tip. Adults have red eyes and have a black cap, with blue-gray upper parts and white underparts with fine, thin, reddish bars. Their tail is blue gray on top and pale underneath, barred with black bands. Immatures have yellow eyes and have a brown cap, with brown upper parts and pale underparts with thin black streaks mostly ending at the belly. Their tail is brown on top and pale underneath, barred with dark bands.
Immatures are somewhat larger than a Sharp-shinned Hawk and smaller than a Northern Goshawk, though small males nearly overlap with large female Sharp-shinned Hawks, and large female Cooper's Hawks nearly overlap with small male Goshawks
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