1980 R.L. Munne Melanerpes formicivorus PRE-NESTING BEHAVIOR SUMMARY School Hill 18-20 May association data at least 84 samples where one of the core (♀260, ♂86, ♂402) seen. of these, only 3 when all 3 birds were together, 1 ♀260 alone, ♂♂ together, one (1) ♂402 ♀260 together, ♂86 elsewhere. (5 min intervals, within 10m or in same tree) Times with ♀ away from ♀ all 3 ♂86 81 3 together 81 ♂402 82 2 not together 3 following behavior both ♂♂ follow ♂86 alone 402 ♂ alone fail to follow both ♂♂ alone ♀86 ♂402 30 0 0 0 0 Association started to break down on afternoon of 21 May, 3 double follows, 2 double non-follows, ♀260 alone in nest. First egg laid 18 May (14, 20, 21, 22, 23). Only eggs 2-4 produced fledged young. Also, ♂♂ showed no interest in 1st yr ♀♀! ♀523 not followed by both ♂♂ ♀524 not followed non-follows 2 (0 follows) 3 (0 follows ♀523 with ♂♂ away from ♂♂ ♀524 with ♂♂ away from ♂♂ 18 23 16 7 for occasions when I know whereabouts of core + the 1st yr ♀ 18 70 16 71 (assumes if I don't see them, not near) for occasions when I know whereabouts of one or the other