LL Wolf 1964 Aimophila humeralis July 29 Cien de Lobos, Pui. E., Guanavaca, 7800 ± ft., Morelos, Mexico. Song 1 1013 - single song from 80 / 50-75 yds downhill from tree #1. 1038 - single song - 80' from new tree #1. 1043 - on N side of gully - pair ? starts to chatter & is joined by other pair, at least one is pair 3. nest ( nest #1 ) - 70 cm above ground in Mimosa? 11 cm outside dia x 6 cm inside x 4.5 cm. deep. gresses - getting fine to inside . few hair hairs in lining.