R.K.Selander, 1959 30 one 2:7 mi. SE Tonalá, Chiapas, México March 27 One time one of the two birds sang "weet-weet-we-weet" after it flew to join the other. I watched while one bird preened the back feathers of the other as it perched motionless with head extended and downward and fluffed its feathers. The two birds were always associated while we watched once I believe they were a pair. At about 10:15 we could no longer hear them- at about the same time the songs and calls of most of the birds in the area ceased. I found a T. pleurostictus foraging on the ground among the dead leaves in the same spot where we first noted humilis and just back a bit from under the nest tree. The wings are constantly flicked out and I believe serve to turn over leaves. I a tangle of acacia, a small, thin trees directly across the road from the nest-tree I found a pair of T. modestus foraging on the ground and on the lower branches of smaller trees. I can see no difference in the habitat preference of these two Thryothorus Wrens Heard chiapensis calling just across the new highway. Also here one "Tico-weet" type cactus wren sang this side of the new road in a small group of trees.