Calls and calling behavior of the frog Leptodactylus natalensis (Amphibia: Anura: Leptodactylidae)

Leptodactylus natalensis has a prolonged calling season, typically from May to September. Individuals occur in and call from the most forested patch of habitat on the campus of the Universidade Federal de Sergipe. Two kinds of calls were recorded and analyzed--advertisement and chirp calls. The function of the chirp call is unknown. The advertisement call has two carrier frequency bands, known to date for only two other species of Leptodactylus. The two carrier bands may correspond to different frequency tuning sensitivities in males and females, as females have slightly larger tympani than males, corresponding with their larger overall size.