Alaska field notes, v4435
Page 237
Image from the Biodiversity Heritage Library. Contributed by Museum of Vertebrate Zoology, University of California, Berkeley. | www.biodiversitylibrary.org
Transcription
SPLWays 1975 Stercorarius pomarinus Britton area, 1 km W of NAPL, Pt Barrow, Alaska 10 June -1035 watched hunting sequence in jaeger: bird had already landed, was tearing apart vegetation with its bill; not too actively, but once every 4-5 seconds it would grab some + throw it aside, then would be about. some flurry of activity. another jaeger flew in (RAP thinks original was 8, second 9) only to be attacked + chased away - it flew ~75 m + landed. then original jaeger caught a lemming, handled it for less than 5 sec, and flew over to the bird which it had just chased away: the second bird, after what looked like a grapple, threw at the lemming. However before the two were finished their bout (within 20 seconds) 5 other jaegers piled into @ their vicinity. Grid 2, N of Smithsonian building, Pt Barrow, Alaska 12 June 3 jaegers over grid at 0910 when we arrived, one displaying: a gliding flight with wings in dihedral followed by a series of flaps (continuous) with very shallow wing beats during which the tips of the wings are kept above the plane of the body pair 1225 jaegers displaying on ground, walking vibrally toward one another, walking parallel within 2 ft. wings lowered, tail raised, neck arched. [illegible] proceeding in circle ?) in radius of less than one foot. 8? (w/out breast band) posture is now jaegers Scratch @directly walking in short waddling extreme exaggeration thrusting out of chest