Another species of Agalychnis is A.
saltator, which lives in the same swamps as A. callidryas
in Costa Rica. This species has plain blue sides instead of the
yellow and blue pattern of A. callidryas. The colors
of this species can change in just 30 seconds, depending on its
mood and time of day. The frog below is sleeping, with eyes retracted
into its head. The next picture shows him waking. Both pictures
show the lime green colors of a disturbed frog at night.