Figure 1

Tadpoles in their natural habitat. Tadpoles of (A) Ololygon machadoi and (B) Bokermannohyla martinsi on their natural backgrounds in a stream at the RPPN Santuário do Caraça, southeastern Brazil. A tadpole of O. machadoi is circled in (B) for comparison of background contrast level with B. martinsi tadpoles.