Alaska species accounts, part 3, v4222
Page 181
Image from the Biodiversity Heritage Library. Contributed by Museum of Vertebrate Zoology, University of California, Berkeley. | www.biodiversitylibrary.org
Transcription
Holmes, R. 1962 Erolia alpina 1 June BARROW, ALASKA Elm wagon bluff - between Wibblocloz & Elegib Sloughs: I bird as it became aware of my presence stood upright (upright posture) - ran to a nearly mound + again took this posture. The fler up - aerial display + part tree + [illegible] landed with b driving over head. [illegible] landed starfledig RB's (Hush 16 nearby) - plan drill as it landed - I kept wing up + continued to give the thrill In aerial display- The wings may be held in several positions: (a) (b) (c) The latter (c) is the most frequent + is the posture in which the wings are vibrated rapidly + or kraa, kreea cue is given. When the bird is going to descend, the wings are set at and the bird glides or swoops to the ground. The wings are usually held at this angle (perhaps even higher) for about 1-2 seconds. They are folded in place + the bird begins to feed. Flocks to three flocks (6, 8, 12 birds) [illegible] thrace today + a number (4-5) displaying birds which were