Other changes in cliff-nesting raptor occurrence included a decrease in occupied Gyrfalcon (Falco rusticolus) territories from four in 1977 to one in 1979 and two in 2008, a decrease in
Rough-legged Hawk (Buteo lagopus) nests from one in 1979 (none in 1977) to none in 2008, and increases in Golden Eagle (Aquila chrysaetos) nests, from two in 1977 and 1979 to five in 2008.
3), 3 Swainson's Hawks (Buteo swainsoni), 2 Ferruginous Hawks (Buteo regalis), 1
Rough-legged Hawk (Buteo lagopus), and 1 Turkey Vulture (Cathartes aura) to the test enclosure (n = 17; Table 1).
The bird lived in an enclosure with another adult red-tailed hawk and an adult
rough-legged hawk (Buteo lagopus), both of which were healthy at that time.
elegans in our study system (see Table 2): Brewer's blackbird, raven, common crow, sharp-shinned hawk, harrier or
rough-legged hawk, and sandhill crane.
"A
rough-legged hawk comes sailing over the meadow ahead.
jamaicensis;
rough-legged hawk; American kestrel, Falco sparverius; and northern harrier) was sufficiently large to include in statistical analyses.
While large tropical eagles impress with their strength and size, migratory hawks, such as the
Rough-legged Hawk, are spectacular flying machines.
Muscovy duck Cairina moschata Mallard Anas platyrhynchos Greater scaup Aythya marila Tufted duck Aythya fuligula Common merganser Mergus merganser Smew Mergus albellus Falconiformes Common buzzard Buteo buteo
Rough-legged hawk Buteo lagopus Peregrine falcon Falco peregrinus Galliformes Common peafowl Pavo cristatus Domestic chicken Gallus gallus Charadriiformes (herring gull) Larus argentatus Strigiformes (eagle owl) Bubo bubo Passeriformes (Eurasian magpie) Pica pica All birds No.
Data from the Audubon Society's annual Christmas Bird Count (CBC) for the
Rough-legged Hawk (Buteo lagopus) population in Colorado were analyzed for the years 1980 to 2000.
Look for the soaring
rough-legged hawk and the hovering kestrel as each hunts for ground squirrels and other rodents.
The others, from the west around to the south, were
Rough-Legged Hawk, Fish Hawk, Marsh Hawk, Hummingbird, Swallowtail Kite, and White-Throated Swift.
Keywords: arctic ground squirrel; collared lemming; Dicrostonyx kilangmiutak; generalist predator; predator diets; prey refuge; red fox;
Rough-legged Hawk; semigeneralist predator; specialist predator.
rough-legged hawk - large hawk of the northern hemisphere that feeds chiefly on small rodents and is beneficial to farmers