Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
1981 R.C. Mumme
Melanerpes formicivorus
Warp 5
30 April walked up to the Black Oak holes at 1400. Nobody answered when I said "hello".
5 May went up to the lower Black Oak hole at 1500 after walter saw a bird looking out yesterday. I, too find a bird looking out. After considerable difficulty in positioning string rope ladder just right, I'm able to prep in. I see 3 eggs, but it looked like there might be a ledge partially hiding my view. will have to open it up tomorrow.
6 May Opened the Black Oak hole. Indeed 3 eggs, somewhat fresh (maybe 3-4 days of incubation). A bird looking out as I got there at 1130.
23 May Nest check by walter here at 1430. Still 3 eggs, nest apparently abandoned. Should have hatched by now. I check the granary, and a few acorns (~100) are still there
5 June I say hello to the hole here (or every hot afternoon, 1230) nobody looks out. So they haven't (apparently) renested in the same Black Oak Hole, or they have a nest elsewhere
12 June They have a nest elsewhere! Trying to watch Rd 1 from PO Hill, I am distracted by Warp 5 birds flying to the same spot on a Valley Oak just below the granary. Sure enough, I walk over and find a well-concealed nest hole. Easy to get to with a rope ladder. Probably climbable, if not for Poison Oak. The VO nest tree is 20 M East of the granary. Hole on NW side of tree, about 5 meters up. 0840, trying to watch hole for a while. 0910, Nothing yet, may be too close, not well enough hidden. Back at 1030 with Walter. Opened hole, 3 babies, about 16 days. The first nest must have been abandoned soon after opening