![]() ![]() The Gyrfalcon almost invariably nests on cliff faces. Most prey is killed on the ground, whether they are captured there or, if the victim is a flying bird, forced to the ground. It usually hunts in a horizontal pursuit. The Gyrfalcon is a bird of tundra and mountains, with cliffs or a few patches of trees. Plumage is very variable in this highly polymorphic species: the typical morphs are called “white”, “silver”, “brown” and “black” though coloration spans a continuous spectrum from nearly all-white birds to very dark ones. Females are rather bulkier and larger at 51 to 65 cm (20 to 26 in) long, a weight of 1180 to 2100 g (2.6 to 4.6 lbs) and have a wingspan ranging from 124 to 160 cm (49 to 64 in). Males are 48 to 61 cm (19 to 24 in) long, weigh 805 to 1350 g (1.8 to 3 lbs) and have a wingspan from 110 to 130 cm (43 to 51 in). It is the official bird of the Northwest Territories. It breeds on Arctic coasts and islands of North America, Europe and Asia. The Gyr Falcon (Falco rusticolus), or Gyrfalcon, is the largest of all falcon species. ![]()
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