Notes on the natural history and habitat use of Eleutherodactylus tzingeri (Anura: Leptodactylidae)

Abstract. Eleutherodactylus tzingeri were studied during the dry and rainy seasons at an Atlantic lowland rainforest in Costa Rica. The frogs had one of three dorsal colour patterns (mottled, striped, uniform) and one of two ventral colour patterns (white, yellow). Males had signi cantly more often a yellow venter than females. Juveniles with a white belly were signi cantly smaller than juveniles with a yellow belly. Males perched higher than females and juveniles. Perch height in males did not vary with the time of day, weather conditions or behaviour. Calling males used more sheltered perches than silent males, and males calling by day used more sheltered perches than males calling by night. Reproductive activity increased greatly at the onset of the rainy season. Males showed little site attachment