A small and difficult to identify woodcreeper, widespread but often rare and seldom encountered. Smaller than most other woodcreeper species in range (slightly larger than Olivaceous Woodcreeper), with a relatively short, straight bill and weakly marked brown plumage. Note the faint pale streaking on the head and spots on the throat. Best found and identified by voice, a fast, even trill lasting between 1-2 seconds and usually heard at dawn.