Rough-legged Hawk

Rough-legged Hawk

The Rough-legged Hawk, also known as the Rough-legged Buzzard, breeds on the open tundra of the Arctic and subarctic, then moves south in winter to open fields, marshes, and prairies across temperate latitudes. Its habit of hovering in place while hunting, along with its distinctive pale-based, dark-tipped tail, make it recognizable among wintering buteos.

Fully feathered legs down to the toes, an adaptation to its cold Arctic breeding grounds, give the species its common name and distinguish its feather set from most other buteos it winters alongside.

Identifying Rough-legged Hawk Feathers

• Tail feathers: pale, often whitish at the base with a broad, sharply defined dark terminal band, a pattern more clean-cut than in most similarly sized hawks.
• Primaries/secondaries: pale below with a conspicuous dark patch at the carpal joint (wrist) and dark wingtips.
• Body feathers: underparts pale with a dark patch across the belly in many individuals; dark-morph birds occur and show much more uniformly blackish-brown body feathers.
• Leg feathers: densely feathered down to the toes, unlike many other buteos with bare lower legs, useful when a whole foot or leg feather set is found.
• The sharply defined pale tail base and dark terminal band, plus dark carpal patches, distinguish this species from Red-tailed and Ferruginous Hawks in shared wintering range.

Plumage

Light-morph adults show pale underparts with a dark belly patch, brown upperparts, and a whitish tail with a broad dark terminal band; dark-morph individuals, more frequent in this species than in many other buteos, are largely blackish-brown overall but usually retain the pale tail base. Juveniles resemble light-morph adults but with browner tones and a less sharply defined tail band. Sexes look broadly similar.

Habitat & Range

Breeds on open Arctic and subarctic tundra across northern North America and Eurasia, nesting on cliffs or rocky outcrops. It is entirely migratory, moving south in winter to open fields, prairies, marshes, and agricultural land across temperate latitudes of North America, Europe, and Asia.

Behavior & Field Notes

Rough-legged Hawks frequently hunt by hovering in place over open ground, a distinctive behavior among buteos, searching for small mammals below. They nest on cliff ledges on the tundra, often far from any trees. A pale tail feather with a sharply defined broad dark tip, or a densely feathered leg/foot feather, found in open winter fields is a good indicator of this Arctic-breeding species during the non-breeding season.