EAC 33, Rexburg, December 1967
Page 46
Image from the Biodiversity Heritage Library. Contributed by Smithsonian Institution Archives. | www.biodiversitylibrary.org
Transcription
3 forced the birds south. It is not likely that the high seas encountered during this survey could have been responsible for so few birds being re- corded. Phalaropes Red Phalarope Number observed: 9 Phalarope sp. Number observed: 16 The concentration in the northern third of the grid is much the same as on the EGS 18 earlier this month. Many of the birds were recorded sitting on the water near floating objects. Pomarine Jaeger (Stercorarius pomarinus) Number observed: 3 Two were light phase adults, and one a dark phase adult. All were seen on 16 December within a half-hour period. Glaucous-winged Gull (Larus glaucescens) Number observed: 17 All birds were immatures and followed the ship. There has never been an adult bird of this species recorded in the grid. This probably reflects the greater wandering tenden- cies of the immatures. Herring Gull (Larus argentatus) Number observed: 116 In a sample of 90 birds, 57 (63 percent) were adults and 33 (37 percent) immatures (first and second year birds). Distribution appears near random except for the central and southwestern sections. In both areas coverage was good, thus the sample is thought indicative of actual numbers. Black-legged Kittiwakes (Rissa tridactyla) Number observed: 80 Kittiwake numbers have increased greatly since EGS 18 (only 4 recorded) earlier this month. The distribution is centered in the north and probably is highest in the north- east corner. Both adult and immature birds were present. Alcids Number recorded: 5 Birds recorded in sections S and W.