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Bald Eagle (American Eagle)
Body contour feather with plumulaceous base

Bald Eagle (American Eagle)

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

AI-generated identification · may be incorrect

Family: Accipitridae (Hawks, Eagles, and Kites)

Shape
Symmetrical vane with a broad, rounded tip
Size
Approximately 6 to 8 inches long, typical of large covert or contour feathers from a mature bald eagle
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Description

The Bald Eagle is North America's iconic raptor, instantly recognizable by its striking white head and tail contrasting with a dark brown body and wings in adults. They are large, powerful birds of prey with massive hooked beaks and broad wings adapted for soaring.

Colour & Pattern

Solid brownish-grey to dark brown pennaceous tip and upper vane, transitioning sharply into a clean, brilliant white base and downy region; central rachis is pale white to yellowish-tan

Barb Structure

Pennaceous vane at the distal end with tightly interlocked barbicels, transitioning sharply to a fluffy, plumulaceous (downy) structure at the proximal base; intact and clean

Rachis & Barb Pattern

Strong, moderately thick central white rachis tapering toward the tip; barbs are densely packed and uniform in the pennaceous section, becoming loose and wispy at the base

Texture & Surface

Smooth, firm, and matte pennaceous upper section with a silky, extremely soft, fluffy downy base

Feather Placement

Body contour feather, likely from the upper breast or mantle, as indicated by the stiff pennaceous tip and the extensive white downy base

Key Features

Distinctive bicolored pattern featuring a dark brownish-grey upper vane sharply demarcated from a completely white fluffy base, combined with the large size characteristic of a massive raptor

Habitat

Found primarily near large bodies of open water with old-growth trees for nesting, including lakes, reservoirs, rivers, coastal areas, and marshes

Geographic Range

North America, ranging from Alaska and Canada down through the contiguous United States and into northern Mexico

Ecological Role

Apex avian predator playing a crucial role in maintaining healthy aquatic and riparian ecosystems by regulating fish, waterfowl, and small mammal populations

Similar Species

Golden Eagle (Aquila chrysaetos), whose contour feathers generally lack the stark white base and are uniformly brownish or have subtle tawny/gold-toned barring

Interesting Facts

Bald Eagles can spot fish from several hundred feet in the air while soaring, and their nests are among the largest in the animal kingdom, sometimes weighing over two tons after being used and added to for decades

Cultural Significance

Deeply sacred to Native American cultures, where feathers are used in spiritual ceremonies, regalia, and prayers; historically exploited but now strictly protected

Field Identification Tips

Look for the signature contrast of dark brown transitioning into a pure white downy base, characteristic of the breast or upper body feathers of mature or sub-adult sea eagles

Condition Notes

Excellent condition with intact barbs, clean white down, and no visible signs of fraying, sun bleaching, or parasitic damage