1987 Ronald L. Grinnell Balanosphyra formicivora. Hastings Reservation, Monterey Co., CA 4 Aug After delightful breakfast with Jean Linsdale, I walked up Haystack Hill in search of the elusive Acorn Woodpecker. at Hay Blom I saw several (5-6) woodpeckers at a great distance, all too far away to be identified by color-band combinations. At Low Hay, 5 birds actively flycatching around the secondary roost holes SE of the granary. All split as I tried to approach, but I did see J1427 M/LBlue Continuing south along Haystack Ridge, I found 4 birds harvesting and eating green acorns from oaks near the artificial granary set up by Susan Hannon (near bluebird boxes 206 and 207). This assemblage included 2 unbanded males, plus 2 Gate birds; ♂1313 Lbn-Brn/White and ♀1315 mauve/Red-Or(civ). It didn't appear that the formation of a new group here was imminent, but it might be something the young upstarts (Koenig, Sta-back, Hooge, etc.) would want to keep an eye on. 6 Aug Rode the new 4-wheeled field vehicle up to the Arnold Place (quite exciting! I wish Annie would have been here to enjoy it as well), arriving at 0600 PST, I was greeted by considerable wak[ing], chasing, etc. from Arnold I. After watching for 3 hours, I finally managed to figure out what was going on: ① The commotion seemed to be the tail end of a power struggle which has resulted in