Birds of the Kilbuck and 

 Ahklun Mountain Region, 



Alaska 



by 



Margaret R. Petersen 

 U.S. Fish and Wildlife Service 

 Alaska Fish and Wildlife Research Center 

 1011 Fast Tudor Road 

 Anchorage, Alaska 99503 



Douglas N. Weir 

 c/o Scottish Ornithologists' Club 



21 Regent Terrace 

 Fdinburgh, Scotland EH7 5 BT 



Matthew H. Dick 

 Department of Biology 

 Yale University 

 Box 6666 

 New Haven, Connecticut 06511 



Abstract. Between 1952 and 1988, we studied the abundance, distribution, 

 occurrence, and habitats used by birds in the northwest portion of Bristol Bay 

 and the adjacent Kilbuck and Ahklun mountains. In the 809 days we were 

 present, we conducted 53 studies or surveys of birds in the region. We gathered 

 information on 185 species, of which 65% (121) nested, 10% (19) probably 

 nested, and 1 1% (21) were permanent residents in the region. Most breeding or 

 probably breeding forms were of North American (58%; 81) or Beringian (24%; 

 33) affinity, while the remainder of the species were of Panboreal (17%; 24) and 

 Old Worid (1%; 2) affinity. Similarly, most of the 44 migrants and visitants were 

 of North American (4l%; 18) affinity, while the remainder were of Beringian 

 (32%; 14) and Panboreal (27%; 12) affinity. Of the 140 species that nested or 

 probably nested, 53% (73) were abundant to fairly common, 29% (40) were 



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