Marshall (1942) Ramphocaenus infriventris Lake Ohonega Open forest of large widely-spaced trees at W end Lakes flat bare ground with occasional dense patches of brush 6' high. In these, Cincostoma and Ramphocaenus, above them, Tolmomyias, and in similar patches but out in the open not shaded by tall trees was Synallaxis. 2 M's heard singing in this brush - Songlean describe only as a "dribble" like blowing tiny bubbles rapidly out of a pipe. Very fine delicate, high, yet sweet, A descending cascade. A descending trill. The bird was seen in far side of brush patch as it hopped around in twigs within 6" of ground & shot. Chulata Humid glade where Tyrannisers, Turdus assimilis and Catharins found. Was in darker deeper part of ravine foraging in shaded sparse brush under trees hopping around in twigs picking off insects? Looked just like Wren-tit in life at (over)