LLWolf (1963 Journal August 17 Tehuantepec, Oaxaca, Mexico Up at 0530. Drove out to 2+ miles east of town + parked along road. John tried to record Aimophila ruficauda, but could only get chatter + call notes. Very sporadic singing. Tried to collect ruficauda here, but this family group is all we could find. Apparently vegetation too dense as A. semichrasti was common. Drove several hundred yards further + parked in area where Thorn forest has been removed + Acacias + other legumes have come in. Vegetation in this field is much more sparse + walking is easy as tree branches from adjacent legumes do not meet. This seems to be preferred habitat of A.ruficauda + they are spaced out in pairs throughout the area. Spent until 0900 collecting here. Found 2 nests of Groove-billed Ani - one with eggs + one with young with feathers just emerging. One nest of Rufous-napped Whin with 4eggs. Flushed a nightjar - probably Caprimulgus ridgwayi - but was unable to collect it. Back to Hotel where prepared specimens rest of day. Wrote notes, had supply + a bed.