Acorn woodpecker species accounts, v4456
Page 287
Image from the Biodiversity Heritage Library. Contributed by Museum of Vertebrate Zoology, University of California, Berkeley. | www.biodiversitylibrary.org
Transcription
1982 R.L. Mumme Melanerpes formicivorus Road 3 12 Jan **GROUP UPDATE** ① ♂618 disappeared 20 Oct 1981 ± ½ day Present 19 Oct, absent 21 Oct+ thereafter 23 Jan Alan watched here with some success. See his notes 25 Jan Granary census, 1420-1620 Still a lot of live oak storing going on. I missed seeing ♂708, ♂709, ♀710. Alan saw 710 2 days ago, but he missed 705 & 709, too. Maybe they've dispersed. ♂144, ♀265, ♂668, ♂537, ♂654, ♂655, ♂656 all seen well. [illegible] 8 Feb Counted stores here, 1600: Valley Oak 760 Sycamore 1300 2060 TOTAL Also took a sample of ~35 acorns, which I replaced with a roughly equivalent # of my own. Acorns taken from the "crotch" of the sycamore 9 Feb Granary census, 0835 - 1035. Wow, a very impressive storing frenzy here, despite the late date. 45 acorns in the first hour, 58 in the first 75 minutes. All live oak acorns (of course) The birds appear to be harvesting them from a tree overhanging the road (from the PO Hill Side) about 50 M down the road from the granary. Twice (♀265 once, an unknown bird the 2nd time) I saw birds bring partially germinated acorns to the granary! The one that ♀265 had had a radicle about 2 cm long, the other was about 5 mm. Could the birds be getting some of these off the ground? Certainly not all