R.K.Selander, 1954 G.chiapensis, nigricaudatus, humilis Campylorhynchus chiapensis 3/4 mi. SSW Tonala', Chiapas, Mexico - as we drove March 19 off the road to camp I saw two birds in the trees and bushes just across the road from camp. One flew into a large mango located just at the spot where we placed our tents. Later it flew across the road. Several times I heard these birds giving their usual call and once two birds dueted for a period of 5 seconds or more. After setting up camp I watched these birds foraging. One bird worked on the ground at the base of the roots of an up-turned tree - searching for food between the root branches, crawling in dark crevices, and on thin root branches. The other was foraging about 10 feet above ground in a small tree, working along the branches. Once I saw this bird peck several times at a clump on one of the branches. For the most part these birds foraged within 3 feet of the ground. A pair of orioles apparently are preparing to nest in the same tree in which the wrens are foraging. There is no conflict between the species. Once the wren chased a Turdus grayi through the brush and through a clearing - all birds calling excitedly. The wrens seem not to be disturbed by our presence here. Lamb said that he heard this wren in the mango tree above our tents late in the afternoon. We did not hear or see wrens on our trip to Puerta Arita so apparently they are silent in