1976 Walter D. Koenig Melanerpes formicivorus Plague (11 April) 1100. leaving 1600. looking out of hole in telephone pole - planning on nesting here? 15 April 1730. Was outside the lab looking up at Plague when 2 birds flew suspiciously quickly and quietly into the trunk area. Just as suddenly 1 flew out and silently over to the telephone pole, where he zipped into the roost hole. A few seconds later the cause became apparent when a Cooper's Hawk (adult) flew out of Plague and up the canyon. 17 April 930. #245 involved at Y. See Y notes. 1300. Florence saw #245 here in home territory. I saw at least 2 unwings treamered birds (probably the other 2 group members), but some chasing was going on as well; the frenzy at Y is evidently carrying over to here to some extent. 18 April 1030. ♂162 from Mac Roberts was seen with another bird over in the lone tree toward Mac Roberts. Apparently there's considerable carry over from Y here, as there is lots of chasing, involving 8+ birds. Birds seen: ① ♂162 [MacRoberts] in lone tree only. ② ♀ ub. in central area. ③ ♀♀ 4/Y [Plague] Chasing intruders in main area [#15?] Two birds, #15? and one other, seem to be doing most of the chasing; those chased seem to be mostly unbanded ♀♀, of which there are several (4+ intruders altogether).