GYRFALCON DIET IN CENTRAL WEST GREENLAND DURING THE NESTING PERIOD

摘要: Abstract We studied food habits of Gyrfalcons (Falco rusticolus) nesting in central west Greenland 2000 and 2001 using three sources data: time-lapse video (3 nests), prey remains (22 regurgitated pellets (19 nests). These provided different information describing the diet during period. relied heavily on Rock Ptarmigan (Lagopus mutus) arctic hares (Lepus arcticus). Combined, these species contributed 79–91% total diet, depending data used. Passerines were third most important group. Prey less common included waterfowl, fox pups (Alopex lagopus), shorebirds, gulls, alcids, falcons. All adults, all but one hare young year. Most passerines fledglings. observed two shifts, first from a preponderance ptarmigan to mid-June, second late June. The video-monitored consumed 94–110 kg per nest nestling per...