COMPOSITION, ABUNDANCE, AND TIMING OF POST-BREEDING MIGRANT LANDBIRDS AT YAKUTAT, ALASKA

摘要: The eastern Gulf of Alaska coastline is suspected providing an important pathway for birds migrating to and from Alaska. Because no intensive study landbird migration has been conducted in this region, we used mist nets the post-breeding landbirds along coast 1994 through 1999. Over six periods, netted a total 316 days (23,538 net-hr) captured 13,490 individuals 46 species (57.3 birds/100 net-hr). Six constituted .65% all captures (ordered by abundance): Orange-crowned Warbler (Vermivora celata), Hermit Thrush (Catharus guttatus), Lincoln's Sparrow (Melospiza lincolnii), Ruby-crowned Kinglet (Regulus calendula), Fox (Passerella iliaca), Yellow (Dendroica petechia). Most (71%) were Nearctic-Neotropical migrants, percentages hatching-year (HY) varied 51 90% among common species. Daily capture rates highest between mid-August mid-September. Migration HY preceded that after- (AHY) 70% Masses migrants significantly less than those AHY individuals. High consistent annual use indicate many small particularly species, departing breeding grounds southern Received 5 April 2004,