Marshall (1942) Thryothorus pleostictus Chulala gorge in fork of prickly large-leaved tree about 6 ft up & absolutely in open. Narrow neck, walls so thin could see right through. Tree right in open. Nest preserved by squashing flat. This nest was very new, had no eggshells in bottom, not even a thickening in bottom the weens certainly appeared to be working on it & it was in the rock chasm where Tolmomyias never seen nor expected, not pendant, I say the weens built it themselves. Were very tame, nest right in open went to it freely - After ($), st collected, #F became very shy & was almost impossible to locate in the rocks & sparse growth