Figure 1 in In front of a mirror: visual displays may not be aggressive signals in nocturnal tree frogs

Figure 1. Males of (a) Hypsiboas raniceps, (b) Dendropsophus nanus and (c) Lysapsus limellum located in the southeastern Pantanal, Corumbá, state of Mato Grosso do Sul, Brazil. Note that all males perform the vocal-sac display behaviour (inflate the vocal sac, with or without vocalization, and maintain it inflated for some time).