K. Selander, 1954 3 mi. SS W Tonala', 100ft., Chiapas, Mexico was payed to the chimney. Apparently these birds are little concerned with the presence of a strange individual of their species. No other species of birds gave any attention to the chimney. There is a group of 8 wrens in the area immediately around camp. Most of the time they are divided into 2 groups of 4 each -- one group frequents the area of the nest tree just across the road from camp while the other group spend a good deal of time around the nest tree farther west down the road. There is mixing of the two groups however, no sign of territoriality. We watched one bird make several trips with nest material to the west-nest and saw 4 birds in the bushes near the nest at one time. There is --suggesting-- some evidence that all eight birds are associated in pairs but we cannot yet be certain of this. Bonnie saw on bird bring nest material to the east-nest while I watched the bird bring material to the other nest. Singing is heard all day but most frequently in the morning. There is no increase in song in the evening. Singing together occurs frequently when two birds fly into the same tree or bush and meet. The tail is fanned out and slightly down and the wings usually droop, the neck is puffed out; The bill is not raised above the horizontal. Often the birds come close together when singing in a duet. The song may be given by a lone bird