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Bald Eagle (American Eagle)
Flight feather (Secondary remige, likely a lower inner secondary or tertial transition)

Bald Eagle (American Eagle)

Kingdom: Animalia, Phylum: Chordata, Class: Aves, Order: Accipitriformes, Family: Accipitridae, Genus: Haliaeetus, Species: H. leucocephalus

Family: Accipitridae (Hawks, Eagles, and Kites)

Shape
Symmetrical to slightly asymmetrical, broad vane, rounded to blunt tip, featuring a distinct dark-to-white color block pattern.
Size
Approximately 10 to 12 inches long, consistent with a medium-to-large secondary flight feather of a large raptor. This matches the expected dimensions for an adult Bald Eagle.
Rarity
Common, having made a remarkable recovery from near-extinction due to DDT poisoning. Now regularly encountered across much of its native North American range.
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Description

The Bald Eagle is North America's iconic raptor, instantly recognizable by its majestic dark brown body, stark white head and tail, and powerful yellow bill. Measuring up to 3 feet in length with a wingspan over 7 feet, it is a formidable apex predator. Its flight is characterized by slow, powerful wingbeats and majestic soaring.

Colour & Pattern

Striking bicolored pattern: solid dark brownish-black distal tip and outer vane, transitioning sharply into a clean white base and inner margin. The rachis is dark near the tip and turns crisp white toward the proximal calamus.

Barb Structure

Tightly interlocked pennaceous structure along the distal dark portion, becoming slightly looser near the white proximal base. Barbs are held firmly together by microscopic barbicels and hooklets, providing aerodynamic strength.

Texture & Surface

Smooth, firm, and stiff with a matte to satin finish. The leading edge is rigid to cut through the air, while the trailing edge is softer and quieter to allow for stealthy flight.

Key Features

Sharp bicolored demarcation dividing a solid dark brown-black tip from a stark white base, combined with the robust structure and size typical of a large accipitrid flight feather.

Habitat

Found near large bodies of open water—such as lakes, reservoirs, rivers, coasts, and marshes—with an abundant food supply of fish and old-growth trees for nesting and perching.

Geographic Range

North America, ranging from Alaska and Canada through the contiguous United States down to northern Mexico. Most populations are permanent residents, while northern breeders migrate south in winter.

Ecological Role

Apex avian predator keeping fish, waterfowl, and small mammal populations in balance. Acts as a vital ecological indicator of aquatic ecosystem health and water quality.

Similar Species

Golden Eagle (Aquila chrysaetos), whose feathers are typically uniform dark brown or feature mottled golden-brown barring rather than stark, clean white bases like the adult Bald Eagle.

Interesting Facts

Bald Eagles can reach diving speeds of up to 100 mph when pursuing prey. Despite their name, they are not actually bald; the white head feathers simply contrast sharply with the dark body.

Condition Notes

Good condition with minor wear along the trailing edge and slight fraying at the extreme proximal white barbs, indicating it was naturally molted.

Bald Eagle (American Eagle) | Feather Identifier