
Golden Eagle
Kingdom: Animalia, Phylum: Chordata, Class: Aves, Order: Accipitriformes, Family: Accipitridae, Genus: Aquila, Species: Aquila chrysaetos
Family: Accipitridae (Hawks, Eagles, and Allies)
- Shape
- Relatively asymmetrical with a broad trailing vane and a narrower leading vane; rounded to slightly tapered tip; slightly curved along the rachis.
- Size
- Estimated at 12 to 15 inches (30-38 cm) in length. This is consistent with a large eagle flight feather; Golden Eagle primaries typically range from 12 to 20 inches.
- Rarity
- Uncommon but stable; protected and monitored due to historical declines.
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Description
A massive, powerful raptor with a wingspan of up to 7.5 feet. Adults are dark brown with a hallmark golden-buff wash on the nape. This feather reflects the immense scale and power of one of the world's most formidable predators.
Colour & Pattern
Uniform golden-brown to dark chocolate brown with subtle 'marbling' or grayish mottling toward the base, typical of sub-adult or adult Golden Eagles. The dorsal surface shows a characteristic golden-bronze sheen in light.
Barb Structure
Tightly interlocked pennaceous barbs transitioning to a small plumulaceous section near the base (calamus); barbs are stiff and provide high aerodynamic lift.
Texture & Surface
Very stiff and smooth texture with a glossy, almost waxy surface to aid in water repellency and reduce drag during flight.
Key Features
Large size, specific golden-brown hue without the distinct white base found in immature Bald Eagles, and a thick, rigid rachis.
Habitat
Open and semi-open country, mountains, plateaus, and rimrock; avoids heavily forested areas.
Geographic Range
Widespread across the Northern Hemisphere; found throughout North America, Eurasia, and parts of North Africa. In North America, they are most common in the West.
Ecological Role
Apex predator; controls populations of medium-sized mammals like jackrabbits and marmots; serves as an indicator of ecosystem health.
Similar Species
Bald Eagle (immature feathers often have more white/mottling), Turkey Vulture (feathers are darker/blacker and lack the golden sheen).
Interesting Facts
Golden Eagles can reach speeds of up to 150-200 mph during a dive (stoop), making them one of the fastest animals on Earth.
Condition Notes
Fair to Good; shows signs of wear at the tip and some separation of the barbs (zipper effect), suggesting it may be a naturally molted feather.