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Cooper's Hawk (Alternate: Chicken Hawk, Big Blue Darter)
Flight feather (remex); Primary flight feather, likely P3-P5

Cooper's Hawk (Alternate: Chicken Hawk, Big Blue Darter)

Kingdom: Animalia; Phylum: Chordata; Class: Aves; Order: Accipitriformes; Family: Accipitridae; Genus: Accipiter; Species: A. cooperii

Family: Accipitridae (Hawks, Eagles, and Kites)

Shape
Asymmetrical vane typical of flight feathers; elongated and slightly tapered with a rounded-to-blunted tip; moderate emargination on the leading edge.
Size
Approximately 7 to 9 inches (18-23 cm) in length. This is consistent with the mid-sized primary feathers of an adult female or large male Cooper's Hawk.
Rarity
Common. One of the most frequently seen raptors in North American suburban environments.
Learn more about Cooper's Hawk (Alternate: Chicken Hawk, Big Blue Darter) in the encyclopedia →

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Description

This is a primary flight feather from a Cooper's Hawk, a medium-sized woodland raptor known for its incredible agility. The bird is characterized by a long, barred tail and rounded wings. Adults have a blue-gray back and rufous-barred underparts, while juveniles are brown and streaky. Their flight involves a characteristic 'flap-flap-glide' pattern.

Colour & Pattern

Alternating broad bands of dark slate-gray to brownish-charcoal and lighter silvery-white to pale gray. Usually 5-7 dark bands are visible. The underside is notably paler and more silvery than the dorsal surface.

Barb Structure

Tightly interlocked pennaceous barbs throughout the majority of the vane for aerodynamic integrity; smaller plumulaceous (downy) barbs at the very base (calamus area).

Texture & Surface

Smooth, stiff, and somewhat glossy. The surface feels resilient to the touch, designed for high-speed maneuvering through woodland environments.

Key Features

Distinctive 'zebra-striping' or banding; narrow leading edge relative to the trailing edge; stiff rachis; silvery sheen on the ventral (under) side.

Habitat

Deciduous, coniferous, and mixed forests; increasingly common in suburban backyard areas with tall trees and bird feeders.

Geographic Range

Widespread across North America, from Southern Canada through most of the United States to Central Mexico. Northern populations are migratory.

Ecological Role

Apex avian predator in woodland and suburban ecosystems. They help regulate populations of smaller birds and mammals. Currently stable and expanding in urban areas.

Similar Species

Sharp-shinned Hawk (smaller, thinner rachis), Red-shouldered Hawk (more translucent 'windows' and different banding spacing), and Northern Goshawk (larger, more mottled/less crisp banding).

Interesting Facts

Cooper's Hawks are 'acrobats of the air.' They are specialized hunters of mid-sized birds and can navigate dense forest canopies at high speeds, often using their long tails as rudders.

Condition Notes

Good to Excellent. The vane is mostly intact with minimal fraying at the tip. No significant 'fault bars' (stress marks) are visible, suggesting a healthy molt cycle.