LL WOLF 1964 Amphila humeralis July 23 Cañon de Lobos, Pmi. E. Guanavaca, Morelos, Mexico 7800+ft. July 23 0613 - on east-facing slope. (at least three pairs). One were suphile chatters followed by several pitza calls + then chatter of pair at bottom of tree(pair #1). Then a third pair chatters 2 min. later. Pair flies up into 8' tree(~6 feet up) + chatters - starts with pitza. One bird stationary + wing flicking (right), other below 1° + moves up during performance. Then both fly off to S where chatter again. 0625-0630 - pair #3 flew to NE to wooded gully. Lit near top of 25 foot tree + chattered. Two facing same direction (SE) + little wing flicking. One then flew off further to NE while other remained on perch. 1½ minute later bird back to perch + both flew off to SE 75+ yds. flying low just above tops of vegetation + lit in 5 foot shrub. Did not chatter. One dropped toward ground. 1½ minute later one in shrub flew 10+ yds S.I. followed closely by 2nd. perched on dead stem (nearly vertical) - one perched at top + other 1° foot below. Both wing flicking (one left-one right). one then dropped toward ground while other remained on top of perch. finally (3½ min) other flew toward ground 105yds- S. 0642 - quiet until now. unidentified finch-dunn brown-singing in 15-foot, partly defoliated tree when a humeralis flies up + chases it. followed by another humeralis + pitza calls. Then move out to ½° way from trunk (6-8 feet up) & begin chatter. Continue moving during chatter so end while almost at tip of branch. Both wing flicking rapidly - one left-one right. One on branch 1° foot above other. Two facing at 90° L.