Marshall (1942) Thryothorus infallurus V. de Santa Ana: Cerro del Aguilá: conspicuously song) in densest brush patches under the largest and densest trees ie brush under heaviest forest. Paired. It's singing pairs close together. Never more than a few ft off and shared this habitat with Catharus aurantirostris and I. maculieutus. Call (song) easily imitated yet it's seldom paid attention - or would come str. to edge of brush, take a look & disappear again before I could shoot - then keep on singing in co. with a out of sight. Song quality & pitch of (A. Sreech-Owl but at close range has some higher notes; ends with a delicate liquid up slurred "whit". Each song is very song & has a few hoots on one pitch, the rest 1/2 lower. A given pair progresses slowly through quite a large area of brush. Cerro de los Naranjos 2297, 2298, 2299 coll at dusk within at edge forest on