Alaska field notes, v4435
Page 205
Image from the Biodiversity Heritage Library. Contributed by Museum of Vertebrate Zoology, University of California, Berkeley. | www.biodiversitylibrary.org
Transcription
JPhypos 1975 07 C. muleator Transect 2 29 June first body of muleators today that I've seen and would be willing to call a flock - along transect 2. It appeared flying out of the Volta slough as a ferocious helicopter passed overhead and spooked everybody (including me). Thus I can't say for sure whether this was induced solely by the spook, or if it was a lurking unit. Territorial BT also present (the flock was solely BT). 30 June Back again at transect 2 - a smaller version of the flock in lieu again, unspooked, colossie. No question. 1040 - along side footprint lake in the wetgram there were several large (20-30/flock) flocks of muleators, transect 4 also had groups. Grid 2 1 July see following record of 4 BT muleators. But at the ranch (as opposed to on the transects) they are behaving as always - at least in that they are territorial. Territorial speed shooting down. 5 July Evening - still territorial BT present, 2 birds. 7 July Transect 5, Grid 3 7 July flocks of C. muleator on Grid 3 today. Still some supplementing in certain areas. 8 July in Grid 2 census picked up flocks of muleators BT today. w/ 27 BT present, it is by far the heaviest array of that grid to date in terms of simple pictoral biomass. There continued to be a few individuals supplementing - particularly in areas where I had followed C. muleator before, i.e. (1,8) region and (3,5) region. I happened through these spots as groups of BT were landing. Appearing to be resident, flew at them, landed, + would supplement one or two. Then fed. Then a few moments later supplement more. The supplemented birds might fly only as far as 10-15 m from supplier - still within old territory. But within a few minutes it would supplement, but without the continuity or consistency of only a few days ago. As if I had ultimately kept forgetting + then remembering that it was defending a territory. PS nest #1 hatched this a.m. I found them still in the nest being brooded at 1040. Completion date -> hatching = ~21 days.