Acorn woodpecker species accounts, v4446
Page 93
Image from the Biodiversity Heritage Library. Contributed by Museum of Vertebrate Zoology, University of California, Berkeley. | www.biodiversitylibrary.org
Transcription
1980 Walter D. Koenig Melanerpes formicivorus Plague Hastings Reservation (30 May) sequence is given on the back of p.16. We know both laid on the 24th, and that $496 skipped the 25th while $494 laid on both the 25th and 26th. Given the hypothetical layings of the 27th and 28th, we presume that $494 laid on each day between the 24th and 27th (4 eggs), while $496 alternated: 24th, 26th, 28th, plus her 1 (or 1½) eggs on the 23rd. If we give her both eggs on the 23rd, she gets 4½, 1½ of which were tossed. Otherwise she gets 4 (1 tossed), while $494 gets 5 (1 tossed - the nut). Either of these are reasonable scenarios. Once again, see our transcribed notes for complete details on our observations here during the last week. 1 June 1445. Checked the hole: still 7 eggs. 5 June 1100. Checked hole: all 7 eggs still there; warm; all appear to be fertile. 6 June 915. Checked the hole, where none of the eggs have hatched as yet. 7 June 900. Checked the hole, finding 1 hatched egg (baby was marked with ink on its left heel pad) from egg #1; eggs #3 and 4 were pipping; eggs #2, 6, and 7 weren't pipping quite yet, while egg #5 had disappeared entirely, with no evidence that it had hatched! 1145. Pam saw $521 over at the Blouquist's Knoll (at 4) today. 1745. Checked the nest again, finding 4 babies plus the 2 eggs. This time I weighed them all and marked them. Eggs 6 and 7 are the 2 still to go. 12 June Nancy reports having seen $494 on the census plot on the side of school Hill this afternoon (!). 21 June Yesterday at 930 I set up the movie camera here and got it