1981 Walter D. Koenig Melanerpes formicivorus Arf, too Heating Reservation 4 January After a little bit of watching at dusk I ambushed the birds up here at 2 holes. The results were as follows: Hole 1, in the tall Valley Oak perch tree near the granaries: 1 bird, 8634, banded last week as a 1st-yr bird at WARP 5! Hole 2, in the large Blue Oak (one of 3 trees) next to the path going to the granary: 3 birds: ① 8528, banded and last seen at the ARF,TOO ambush in late November 1979. ② 8 unband, wow 8636, a first-yr bird by the wear on his primaries and his dark eye. ③ 8635, another 1st-yr bird: banded last week at Warp 5. This all makes the issue of what's actually going on up here very confusing. The most likely explanation is that Warp 5 and ARF, too are in fact one group, probably centered primarily at Arf,too. This seems reasonable, although it means that this is really a rather large group and covers a remarkably large territory. That 8634 and 635 are in the process of dispersing is also possible, but seems a little less likely. In any case, my guess is that there are 2 groups only in this area: ARF and Arf,too/Warp 5. Some careful watching would definitely seem to be in order at this point! 13 April Saw 8629 from "Warp 5" up here; see Warp 5 notes. 21 May Incredibly enough, Ron found a nest here-way across the ravine (West Ravine?) as you go up to ARF. We went there this afternoon and Ron opened the nest, finding 3 babies (one of whom was definitely on the way out) about