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Rough-legged Hawk (also known as Rough-legged Buzzard)
Primary flight feather, likely one of the outer remiges (P7-P9) due to the slight emargination and asymmetry.

Rough-legged Hawk (also known as Rough-legged Buzzard)

Kingdom: Animalia; Phylum: Chordata; Class: Aves; Order: Accipitriformes; Family: Accipitridae; Genus: Buteo; Species: Buteo lagopus

Family: Accipitridae (Hawks, Eagles, and Old World Vultures)

Shape
Asymmetrical with a narrower outer vane and wider inner vane. The tip is rounded, and the overall shape is elongated and slightly curved.
Size
Approximately 28–32 cm in length. This is consistent with a primary flight feather of a large Buteo hawk, where primaries typically range between 25 and 35 cm.
Rarity
Common in its specific northern range during summer and reliably found in open winter habitats, though less common than the Red-tailed Hawk in many regions.
Learn more about Rough-legged Hawk (also known as Rough-legged Buzzard) in the encyclopedia →

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Description

The Rough-legged Hawk is a large, elegant raptor named for its feathered legs which extend down to the toes—an adaptation for Arctic life. They have a wingspan of up to 56 inches. This feather represents the light-morph variety, characterized by high-contrast plumage and a distinct dark terminal band on the tail and dark wrist patches visible in flight.

Colour & Pattern

Striking bi-colored pattern typical of light-morph individuals. The distal half (tip) is a deep chocolate brown/black, while the proximal half (base) is a creamy white. The transition is somewhat irregular rather than a straight band. The ventral side is lighter and more silvery.

Barb Structure

Densely packed pennaceous barbs throughout most of the vane, giving it a rigid structure for flight. The base of the feather shows softer, plumulaceous barbs for insulation. Barbules are tightly interlocked with hooklets.

Texture & Surface

The dorsal surface is smooth and somewhat matte with a slight sheen on the dark portion. The texture is stiff and resilient, designed to withstand high-pressure airflows. The leading edge is stiff and sharp.

Key Features

Distinct contrast between the dark distal portion and the white base; large size; asymmetrical primary shape; lack of fine distinct barring typical of Red-tailed Hawks.

Habitat

Breeds in the Arctic tundra and taiga regions. Winters in open country, including grasslands, agricultural fields, prairies, and marshes in temperate regions.

Geographic Range

Circumpolar distribution. Breeds in northern North America and Eurasia. Migrates south to the contiguous United States, central Europe, and central Asia during the winter months.

Ecological Role

High-level predator. They play a crucial role in controlling rodent populations, specifically lemmings in the Arctic and voles in their wintering grounds.

Similar Species

Red-tailed Hawk (Buteo jamaicensis) feathers usually have more distinct fine barring; Ferruginous Hawk (Buteo regalis) feathers are generally larger and often have more rufous tones.

Interesting Facts

The Rough-legged Hawk is one of only three North American raptors (along with the Golden Eagle and Ferruginous Hawk) that have feathers extending all the way down to their toes for cold-weather insulation.

Condition Notes

Excellent condition. The barbs are mostly intact with very little fraying at the edges. The color remains vibrant, suggesting it was likely a fresh molt or retrieved shortly after being lost.