Alaska field notes, v4436
Page 119
Image from the Biodiversity Heritage Library. Contributed by Museum of Vertebrate Zoology, University of California, Berkeley. | www.biodiversitylibrary.org
Transcription
JPLayers 1976 Journal Transsects 6-10 19 August (cont'd) At the [illegible] risk of being proven an error, I venture to say that the seam is winding down. Dunlins are numerous, but falling. Pectorals have all but gone, as have red phalaropes (from the tides). Only golden plovers are on the upswing, and possibly Limnodromus, even though I picked no doubtless in the sample. GRIDS 2-3 20 Aug warm southwesterly, with temp at 42° at 0600. Cloudy, threatening sky w/ rain on horizon. I covered grids 2-3 this am. The big news of the morning is that birds are moving - juvenile mulelets, juvenile Limnodromus s. are wafting about in the SE southwesterly, moving. Elude that old migratory walkover - migration itself. The total of the grids this am. is [illegible] migration totals: #2 #3 Polysticta stellaris Pluvialis dominica j 1 C. alpina a 25 j 3 C. alpina a 27 j 2 C. melanocephala ♂ 0 ♀ 0 j 22 C. melanocephala ♂ 0 ♀ 12 Cypella j 1 Ph. fulicarius ♂ 0 ♀ 0 j 14 Ph. fulicarius ♂ 0 ♀ 8 Limnodromus s. j 15 Limnodromus s. j 17 Stercorarius a 1 j 2 Stercorarius a 2 j 1 Calcarius 3 Calcarius 2 Petrochelidon 3 Asio flammeus 1 Cautin - the fact that birds are restless contributes significantly to potential error in the counts. Unfortunately, I have no way of estimating reasonable error bounds my technique should produce, if anything, a conservative estimate of birds on the grid. However, with individuals flying about within the grid it becomes particularly difficult. Ross Greenberg left this afternoon on the evening Wein plane - the summer is nearly over.