Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
1976 Walter D. Koenig
24
Melanerpes formicivorus
Plague
Hastings Reservation
(3 September)
1976. There are other calls coming from the lower edge of Red Hill -
clearly many birds are in this vicinity getting acorns.
4 September
1530. ♀️ / or #22 and a ♂️ briefly in 2º tree; birds come
here occasionally (in this case the ♂️ was eating a green
acorn), but are otherwise spending their time in the forest
just up Chongo with the other foreign birds, where all
are getting green acorns.
7 September
1130. ♀️157 atop 2º tree.
11 September
1330. ♂️22 atop Plague tree. ♀️157 and ♂️ub near upper barn, ♂️ busy
eating a green acorn.
17 September
1800. ♂️22 atop 2º tree with the ♂️; a 3rd bird by upper barn.
Meanwhile, 2 birds (1 a ♀️, the other a ub ♂️) were up between
Red - the Hastings cabin and the water tank; their affinities are unknown.
28 September
1800. ♀️157 and a ♂️ in 2º tree; a 2nd ♂️ in the roost hole of
the telephone pole.
I was unable to find any stored acorns.
4 October
Noticed that the rotten limb used as a nest last year and
this year in the Blue Oak by the labs broke off, no doubt during
last week's storm.
8 October
1045. All 3 birds were around here, storing, hawking, and
trying to keep Magpies out of the granaries. ♀️LB/LB #22 seen,
Also ♂️LB-ub/ub #157.
To get a vague idea of maximum storage rates, I counted
again, 10 days following the 28 Sept. check revealing no acorns:
Plague tree: 280; 2º tree: 41; tel pole: 10; TOTAL: 331, or
33/day, or 11 acorns/bird/day. (Certainly not unbelievably high!)
10 October
1130. ♂️22 hawking atop Plague. Storing going on also.