Range. - Arctic regions; south in winter casually to northern United States, chiefly on the coast.
Gyrfalcons are large, strong, active and fearless birds, about 23 inches in length. Their food consists chiefly of hares, Ducks and Waders which abound in the far north. The present species is snowy white, more or less barred with blackish brown on the back and wings and with a few marks on the breast. They nest upon the ledges of high cliffs, laying three or four eggs of a buffy color, blotched and finely specked with reddish brown, this color often concealing the ground color. Size of eggs, 2.30 x 1.80. In America, they nest in Greenland and the Arctic regions.