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Cooper's Hawk
Secondary flight feather (remex), likely S3-S6

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
Relatively asymmetrical with a rounded, broad tip; the trailing vane is significantly wider than the leading vane, which is typical for secondary flight feathers.
Size
Estimated 5.5 to 7 inches in length; width is approximately 1.5 inches. This falls squarely within the secondary range for an adult female or large male Cooper's Hawk.
Rarity
Common; one of the most frequently encountered backyard raptors in North America.
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Description

This is a signature wing feather of a medium-sized hawk specialized for agile flight through dense trees. The adult bird has a blue-gray back and a crown that contrasts with its lighter nape, along with reddish-orange barring on the breast and thick dark bands on a long, rounded tail.

Colour & Pattern

Boldly banded (barred) with alternating dark charcoal-gray/brown and pale off-white to light gray bands. The tip is dark with a very fine white terminal edge. The underside (ventral) is paler with more diffuse barring.

Barb Structure

Densely pennaceous and tightly interlocked with microscopic hooklets (barbicels), providing a firm, aerodynamic surface. The base shows a small amount of plumulaceous (downy) barbs near the calamus.

Texture & Surface

Smooth, stiff, and slightly glossy on the dorsal surface. The vane is rigid enough to resist air pressure but retains the micro-texture characteristic of diurnal raptors (lacking the velvet of an owl).

Key Features

Heavy, even charcoal-and-white banding; rounded tip; stiff texture characteristic of Accipiters; size larger than a Sharp-shinned Hawk but smaller than a Goshawk.

Habitat

Woodlands, forest edges, and increasingly common in leafy suburban areas and parks where prey is abundant.

Geographic Range

Common year-round resident across most of the United States and Mexico, with northern populations in Canada migrating south for the winter.

Ecological Role

Apex avian predator in woodland and suburban ecosystems; helps regulate populations of medium-sized birds (doves, starlings, jays) and small mammals.

Similar Species

Sharp-shinned Hawk (smaller, usually thinner bands) and Northern Goshawk (larger, bands usually more wavy or mottled).

Interesting Facts

Cooper’s Hawks are known as 'pigeon hawks' or 'chicken hawks' and are masterful hunters of other birds. They are famous for their 'stealth' attacks, often flying low to the ground and over obstacles to surprise prey.

Condition Notes

The feather appears to be in excellent condition with minimal wear or fraying, suggesting it was recently molted. No fault bars or parasite damage are visible.

Cooper's Hawk | Feather Identifier