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Cooper's Hawk
Primary flight feather (remex), likely P7-P9

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
Highly asymmetrical vane, elongated and slightly curved, with a rounded to slightly pointed tip. The leading (outer) vane is significantly narrower than the trailing (inner) vane.
Size
Estimated 7.5 to 9 inches (19-23 cm) in length. This matches the typical range for intermediate primary feathers of an adult Cooper's Hawk.
Rarity
Common; one of the most frequently encountered backyard raptors in North America.
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Description

This feather belongs to the Cooper's Hawk, a medium-sized forest hawk built for agility. Adult Cooper's Hawks feature blue-gray backs and rufous-barred underparts, with a long, banded tail. Their flight is characterized by a 'flap-flap-glide' pattern as they navigate dense foliage.

Colour & Pattern

Distinctive bold horizontal banding (barring). The dark bands are deep chocolate brown to charcoal, while the light interspaces are white to pale cream. The tip is dark brown. The underside is generally paler with more muted contrast.

Barb Structure

Densely pennaceous across the majority of the vane for aerodynamic integrity, transitioning to plumulaceous (downy) at the very base (calamus area). Barbs are tightly interlocked with hooklets.

Texture & Surface

Stiff and smooth to the touch, with a slight matte luster. The trailing edge is flexible, while the leading edge is very rigid to withstand air pressure during flight.

Key Features

Bold, clean dark-and-white banding; outer vane significantly narrower than inner vane; stiff rachis; sized larger than a Sharp-shinned Hawk but smaller than a Goshawk.

Habitat

Woodlands, forest edges, and increasingly common in leafy suburban areas and urban parks where bird feeders attract their prey.

Geographic Range

Found throughout North America, from Southern Canada to Northern Mexico. Northern populations are migratory, while southern ones are year-round residents.

Ecological Role

Apex avian predator in woodland ecosystems. They help regulate songbird populations and serve as an indicator for healthy, diverse forest and suburban habitats.

Similar Species

Sharp-shinned Hawk (smaller, less robust rachis) and Northern Goshawk (larger, usually with more marbled or wavy barring patterns).

Interesting Facts

Cooper's Hawks are 'true hawks' or accipiters, specialized in hunting other birds. They can maneuver through thick brush at high speeds, often using their long tails as a rudder.

Condition Notes

Good to Excellent. The feather appears freshly molted with very little fraying or UV bleaching. The calamus is clean, suggesting a natural molt rather than a forced removal.