Acorn woodpecker species accounts, v4460
Page 249
Image from the Biodiversity Heritage Library. Contributed by Museum of Vertebrate Zoology, University of California, Berkeley. | www.biodiversitylibrary.org
Transcription
1988 M. Stanback 7 M. Formicivorus (18 Mar) acorn carrying since those 2 events this morning. 1600 Just saw a bird flycatching (1 sortie) At least I think it was flycatching - it could have decided to return to its perch after taking off. The birds are feeding on green acorns. Feeding bouts on an acorn are often disturbed by other birds (non-group members) 1615 A bird just left the curve oak with an acorn. It flew to the same destination as this morning! This tree is a healthy green oak with no visible dead limbs. Furthermore, the bird flew into the center of the crown. Just saw a Nuttall's sized woodpecker (see back of p.6) pecking in the dirt bank of the road cut! Primaries + 2° worn and very brown, More ACW notes - where you find one roost hole, you'll usually find 4-5, on the same limb. 1750-1810 Roost watch. @5 birds were hanging out in the hotel tree r environs on arrival. They left @ 1757. 1804 2 birds returned, sat around for 1 minute then both roosted in the same hole (@30 sec apart). At 1807 3 more birds arrived - 2 engaged in pre-roost mounting - the third flew over and interrupted it. 1809 one bird entered & roost hole. 1910 the 2 last birds, after 1 mount, both roosted in that hole. So... 5 birds in this one roost hole. 19 Mar 0800 Ground foraging: bird sits on a fence post and scans the ground - for sometimes up to a minute. Sometimes a bird flies toward the ground only to return to the post without landing. Is