Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
1980 Walter D. Koenig
6
Melanerpes formicivorus
Finch
(14 July)
3) Two birds taken at once, apparently from the
same place, and eaten simultaneously. (Sandy's last watch
on 12 July proves all to be well then).
My (wild) guess is that something nailed these birds
in the roost hole at night, took them each down to the
ground to pluck, etc., and ate them separately, possibly
even entering the hole for the 1st and then returning
for the 2nd. Clearly this must have been some nocturnal
predatory bird, e.g. an Owl. The only owl that could
reasonably be expected to overpower an Acorn Woodpecker,
however, is a Screech Owl, as Pigny Owls can't weigh
much more than 1/3 that of an adult AW. All this seems
vaguely improbable, but what else could get 2 birds
from the same place (other than by entering a roost hole)
and take them individually to the ground to pluck? (The
feathers could not have been tossed from the air or the
roost hole, as they were too orderly). Thus the mysteries of
nocturnal predation deepen.
15 July
930. Watching. ①♀ Red/LG #500. ③ jdg-Yel/Mauve #541. ③ jDe/Dk #543;
④♂ Red/LB-WH #66.
940. A newly-fledged baby ⑤ jdg-BP(in)/M #614.
1005. He's still here: ⑥♂ La/Yel #501 in Sycamore. ③♂ Red/Tan #282.
1025. The final baby is here, also: ④ jLB-Or/LB #542.
1030 Leaving. That about wraps up the alternatives: #293
is surely the adult victim from the massacre described above.
There is still a baby squawking from the nest, also.
Purge: #293. Found dead (predated). Died either 12 or 13 July.