
Cooper's Hawk (also known as Big Blue Darter, Chicken Hawk, or Hen Hawk)
Kingdom: Animalia, Phylum: Chordata, Class: Aves, Order: Accipitriformes, Family: Accipitridae, Genus: Accipiter, Species: A. cooperii
AI-generated identification · may be incorrectFamily: Accipitridae (Hawks, Eagles, Kites, and Old World Vultures)
- Shape
- Symmetrical to slightly asymmetrical vane with a rounded to slightly blunt tip and straight, parallel edges typical of a raptor tail feather
- Size
- Approximately 8 to 10 inches long, highly consistent with a tail feather from an adult or subadult Cooper's Hawk
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Description
The Cooper's Hawk is a medium-sized, agile forest dweller with short, rounded wings and a long, rounded tail used as a rudder for high-speed chases through dense timber. Adults feature dark slate-gray crowns, blue-gray backs, and reddish-barred underparts, while juveniles are brown with heavily streaked chests and bright yellow eyes.
Colour & Pattern
Striking alternating dark grayish-brown and pale gray-white horizontal bands (bars) with a dark terminal band and a narrow white tip
Barb Structure
Tightly interlocked pennaceous structure along the vane with strong barbicels, transitioning to a slightly plumulaceous (fluffy) base near the calamus
Rachis & Barb Pattern
Strong, rigid, pale cream to white central rachis with a rounded dorsal side and channeled ventral side; barbs are densely packed and uniform
Texture & Surface
Smooth, stiff, and matte texture with high rigidity in the vane to withstand aerodynamic forces during high-speed forest navigation
Feather Placement
Tail (rectrix), identified by the characteristic long, stiff shaft, squared or rounded tip, and distinct even banding pattern found on hawk tails
Key Features
Bold, dark and light alternating bands across the tail, a prominent dark terminal band, a narrow white tip, and stiff, durable raptor feather construction
Habitat
Deciduous, mixed, and coniferous forests, open woodlands, river groves, and increasingly in suburban and urban neighborhoods with mature trees
Geographic Range
Widespread across North America, breeding from southern Canada down through the United States and into Mexico, with northern populations wintering further south
Ecological Role
Apex avian predator in woodland and suburban ecosystems, helping to regulate populations of songbirds, doves, and small mammals
Similar Species
Sharp-shinned Hawk (Accipiter striatus) and Northern Goshawk (Accipiter gentilis); Sharp-shinned tail feathers are smaller with a squared tip, while Goshawk feathers are larger and paler
Interesting Facts
Cooper's Hawks are master acrobatic flyers capable of reaching speeds up to 50 mph while weaving through thick branches to ambush prey, primarily catching medium-sized birds and mammals
Cultural Significance
Historically persecuted as a poultry thief (hence the name 'chicken hawk'), today protected by law; hawk feathers hold deep cultural significance in many Indigenous American traditions
Field Identification Tips
Look for molted tail feathers under favored roosting trees or pluck piles in wooded suburban areas; distinguish from owls by the stiff, non-velvety texture and from falcons by the broad, even barring
Condition Notes
Good condition with intact barbs, minimal wear along the edges, and clear, vibrant coloration indicating it was recently molted or shed