Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
1983 R.C. Numme
Melanerpes formicivorus
Plague
5 April
* * GROUP UPDATE *
① ♂473 disappears 4 Jan ± 1 month
Last seen by Alan 17 Nov, missing 19 Feb.
1700, I opened the new hole, and found that
it has a long way to go yet. Not very deep, very
rough, ragged bottom.
6 April Routine gra-ary census, 0820-1020, save for an interesting
intruder (♀815 of CV2). Only ♂521, ♀494 ♀496,
♂723 seen.
Also, birds are still very much committed to the
new hole. Never saw anybody fly up toward Adobe
or Backeye Hills, and saw several trips to the new hole.
Only suspicious thing is that the birds continue to make
a lot of trips to the Big Blue Oak + MacRoberts. Will
have to make sure nothing is going on over there.
7 April Checked the hole here, 1230, found it shaping up, but
still not ready for eggs yet.
10 April Checked the hole, 0830. 2 birds flushed as I climbed
up to the hole, but the bottom is still pretty rough.
12 April Bad news, we blew it again! I had Philip watch the
hole here from 0610-0845, and he recorded a pretty
steady stream of birds in + out of the new hole. I climb
up and find 3 eggs marked ①-③! 11 April (and
maybe 10 April) were undoubtedly the critical days.
Oh well, we live + learn. I'm sure both ♀♀ laid today.
Tossing may have occurred yesterday.