The Panama cross-banded tree frog (Smilisca sila ) is a species of frog in the family Hylidae found in the humid Pacific lowlands of southwestern Costa Rica to eastern Panama and in the Caribbean lowlands of Panama and northern Colombia.
Males grow to 45 mm (1.8 in) and females to 62 mm (2.4 in) in snout–vent length. They are gray, tan or reddish brown in dorsal colouration, with tuberculate skin. White or green flecks as well as darker blotches and markings may be present. Ventral surface is creamy white.
Panama cross-banded tree frogs are nocturnal. Breeding takes place during the dry season when males call from the edges of forest streams. Males call more and using more complex calls on moonlit nights. They also use concealed sites (such as under leaves) less. It is suggested that this is possible because the frogs can detect predatory bats (e.g., fringe-lipped bats) more easily when there is moonlight.
