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Cooper's Hawk
Secondary flight feather (Remex)

Cooper's Hawk

Kingdom: Animalia, Phylum: Chordata, Class: Aves, Order: Accipitriformes, Family: Accipitridae, Genus: Accipiter, Species: Accipiter cooperii

Family: Accipitridae (Hawks, Eagles, and Kites)

Shape
Asymmetrical vane typical of flight feathers, with a rounded tip and a slightly curved outline. The trailing vane (wider side) is significantly broader than the leading vane.
Size
Estimated 5.5 to 7 inches in length. This is consistent with the secondary feathers of a Cooper's Hawk, which are shorter than the primaries but wider and more rounded.
Rarity
Common; a widespread raptor frequently seen in Iowa throughout the year.
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Description

This feather belongs to a medium-sized hawk known for its agility. The Cooper's Hawk has a long, banded tail and rounded wings. Adults have a blue-gray back and rufous-barred underparts, while juveniles are brown above with vertical streaks on the chest.

Colour & Pattern

Distinctive bold banding pattern consisting of four to five dark brown or charcoal-gray horizontal bars against a lighter grayish-white background. The tip is dark, and the bands are relatively even in width.

Barb Structure

Mostly pennaceous and tightly interlocked for flight efficiency, with a small plumulaceous (downy) section at the base of the calamus for insulation.

Texture & Surface

Smooth and firm to the touch with a matte finish. The surface is designed for silent, efficient flight through wooded habitats.

Key Features

Bold, even horizontal banding; rounded tip; grayish-white base color; specific size range for an Accipiter hawk.

Habitat

Mixed woodlands, deciduous forests, and increasingly common in suburban backyards where they hunt songbirds near bird feeders.

Geographic Range

Year-round resident throughout much of the United States and Mexico; northern populations in Canada migrate to the southern U.S. and Central America for winter.

Ecological Role

Apex avian predator, primarily controlling populations of medium-sized birds (doves, jays) and small mammals.

Similar Species

Sharp-shinned Hawk (smaller, narrower bands) and Northern Goshawk (much larger, more fine barring/vermiculation).

Interesting Facts

Cooper's Hawks are 'stealth fighters' of the bird world, capable of high-speed maneuvers through dense branches to catch other birds in mid-air.

Condition Notes

Good condition. The barbs are mostly intact with minor fraying at the edges, suggesting it was a naturally molted feather rather than one lost during a struggle.

Notes

Cedar falls Iowa