Marshall (1942) Thamnophilus doliatus Lake Olomega Pairs common in densest scrubby forest, of low trees and high bushes in flat country on S & SW sides of lake. Commonest in dense growth just E of camp where almost impenetrable & scrubby trees formed continuous roof of foliage about 20' high. Will has peculiar "subparine" wooden quality, slightly ascending in pitch, next to last note accented, last lower in pitch. Very tame. Crest loose & erected when trilling; tail vibrates with each note. Volcan de Santa Ana Several pairs present in dense brushy areas on S slope Cero del Aguila where forest cleared off. Same place where Tapera found. Chilata - Noted.