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Golden Eagle
Outer Primary Flight Feather (Remiges), likely P8 or P9 based on the significant emargination.

Golden Eagle

Kingdom: Animalia, Phylum: Chordata, Class: Aves, Order: Accipitriformes, Family: Accipitridae, Genus: Aquila, Species: Aquila chrysaetos

Family: Accipitridae (Hawks, Eagles, and Allies)

Shape
Highly asymmetrical with a very narrow leading edge (vane) and a broad trailing edge. Characterized by deep emargination (notching) on the inner web and a tapered, rounded tip.
Size
Estimated 35-42 cm (14-16 inches) in length. Consistent with the outer primaries of a large female or male Golden Eagle, which range from 30 to 50 cm depending on position.
Rarity
Uncommon to Rare. While widespread, they have large territories and low population densities compared to other hawks.
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Description

A magnificent primary feather from a sub-adult Golden Eagle. These birds are massive raptors with wingspans reaching up to 7.5 feet. They are named for the golden-buff feathers on the back of their heads. Immature birds show distinctive white patches in the wings and at the base of the tail, which are clearly visible in the white mottling of this specific feather.

Colour & Pattern

Dark chocolate-brown to near-black distal half. The proximal (base) half features a mottled white and light-grey 'window'. This pattern is highly indicative of a sub-adult (immature) individual, as adults transition to more solid dark brown.

Barb Structure

Tightly interlocked pennaceous barbs throughout most of the vane for aerobic flight; plumulaceous (downy) barbs present only at the very base near the calamus.

Texture & Surface

Stiff, smooth, and slightly glossy. The leading edge is incredibly rigid to withstand high wind pressure during soaring and stooping.

Key Features

Large size, dark chocolate color, sub-adult white mottling at the base, and deep emargination of the inner vane.

Habitat

Open and semi-open country, mountain ranges, cliffs, and tundra. They prefer areas with high cliffs for nesting and expansive terrain for hunting.

Geographic Range

Widespread across the Northern Hemisphere. Found throughout North America (primarily West), Eurasia, and parts of North Africa. Northern populations are migratory.

Ecological Role

Apex predator and scavenger. They play a vital role in controlling populations of medium-sized mammals like jackrabbits and ground squirrels.

Similar Species

Juvenile Bald Eagle feathers (which usually have more extensive, 'messier' white mottling) and Turkey Vulture feathers (which lack the white base and have a different texture).

Interesting Facts

Golden Eagles are capable of killing prey as large as deer and mountain goats. They can reach speeds of 150-200 mph during a diving stoop. In many Native American cultures, these feathers are among the most sacred of all objects.

Condition Notes

Good to Fair. The feather shows significant wear and 'nicking' along the trailing edge, likely from active use or contact with brush before being molted. Some separation of the barbs is visible.

Golden Eagle | Feather Identifier