Turnover and dispersal in a peregrine Falco peregrinus population

摘要: In south Scotland, most Peregrines returned to the same territories breed in successive years, though a few females changed territory from one year next. Annual mortality among breeding birds was at 9% (or 11% both sexes combined). There may have been considerable annual variation, however, and excluding exceptional out of five reduced estimate for 7%. These estimates are maxima, but still considerably lower than those obtained ring recoveries dead reported by members public. Among trapped birds, four males first bred age two three another or five; year, 13 years old three. Five other which were seen be first-year plumage not trapped, also laid eggs, 12 such paired held did lay. Only male plumage. In their movements between natal territories, some moved further males, with median distances 83 58 km respectively. addition, study area, greater proportion had born locally, despite an equal sex ratio fledglings; this consistent dispersal females. general, made much longer life subsequently. Movements any direction.