Rough-legged Hawkcolor pattern like Buzzard but smaller-sized (L 60 cm). Extremely variable. From dark morph through reddish morph to very pale morph. Typical morph shows pale head, breast and tail contrasting with rufous belly, and lacks tail barring of most other buzzards. Dark carpal patches, rusty underwing coverts, flight feathers paler with black trailing edge and wing tip. Female slightly larger than male. Juvenile has faintly barred tail, black on trailing edge of wing less marked. Race cirtinsis smaller, often paler, lacks dark morph.

Buteo Lagopus is a diurnal (daytime), and sometimes crepuscular (dusk and dawn), hunter that pursues prey from elevated perches or the air depending on availability of perches, weather, and possibly other factors. When hunting from the air, soars or uses flapping/gliding flight but periodically kites into the wind. Normally catches live prey on the ground, attacking from above in vertical or diagonal pounces. It does not pursue prey by walking, running, or hopping on ground. These hawks also rob prey from other birds. After capture, prey is carried to a nearby perch for ingestion. These hawks are complete migrants with the entire population moving from breeding grounds in the arctic/subarctic to open country in southern Canada and U.S. Usually migrate alone or in loosely aggregated flocks. When migrating, use powered flight and flapping and gliding intermittently, or soar on updrafts and thermals. During migration they are seen primarily in valleys, away from densely forested areas. Undertakes long water crossings (up to 62 miles) by either soaring in circles high out over water or using flapping and sailing flight. In level flight, The rough-legged hawk tends to utilize steady wing beats with less of the “pump and glide” type of flight that other buteos use. They soar and glide with their wings held in a dihedral or “V”. This species seems less dependent upon the use of thermals than other buteos. In soar, wings and tail spread to full extent. The rough-legged hawk is quite trusting and docile around humans, allowing close approach which can put them at some risk. Around the nest however, it is a fierce defender. Communal roosting at night, on some wintering ranges, has been documented in association with high rodent populations.  In its breeding range it is a bird of open tundra’s and mountainsides, avoiding forests unless they contain plenty of open ground. It soars and hovers over such country with great grace and ease, constantly making use of wind currents, and sometimes quartering the ground, flying low like a harrier. When soaring against the wind it hovers, more than most other buzzards. It perches on rocks, trees, telegraph poles and the like, and when no such perches are available it will sit on a low hummock, boulder or bush. When perched it is normally very erect in posture. The Rough-legged Buzzard is generally a tame species, allowing close approach by man, but near the nest it is aggressive and excitable. The female is generally more aggressive than the male.

Rocky or stony country, semi desert and steppe, also open woodland or woods with clearings, from plains and foothills to mountains. In winter, widely scattered in variety of habitats, from desert to cultivation and wooded areas. Uses prominent perches on trees, posts, rocks, etc.

Bulky stick nests are built high on cliff ledges or recesses, rocky or dirt outcrops, or on eroded riverbanks with a good view of the surrounding area. Rarely nest on level ground. Where cliffs are not available, trees and occasionally man-made structures will be used. Nests are refurbished each year and can become quite large; alternate nests may be built nearby. Favored sites are likely traditional and used for many years by the same pair unless they are displaced by another raptor. Whenever possible, the highest of all potential nest sites will be chosen.
Rough-legged hawks become sexually mature at 2 years and are monogamous. The pair bond is maintained at least through the breeding season. Replacement clutches are sometimes laid, particularly if the first clutch is lost before hatching. As with most arctic birds of prey, the Rough-legged hawk’s productivity is closely tied to their prey. In years with high prey populations, more eggs are produced and more chicks survive to fledge. In low prey years, the predators may not breed. Eggs rounded oval, not glossy; white, streaked and blotched reddish-brown, occasionally only slightly, very rarely not at all. Clutch: 3-4 (2-7). Varies with food supply, particularly lemmings and voles, with 2-3 in poor years and 5-7 in good years.

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