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