description Tungara Frog Overview
The Tungara frog, scientifically named Engystomops pustulosus (formerly Physalaemus pustulosus), is a small amphibian native to Central America and northern South America. It is a highly influential model organism in evolutionary biology, particularly noted for the complexity of its male mating calls. Male Tungara frogs produce a whining call that can be optionally followed by one or more "chuck" sounds. These vocalizations serve as a primary system for studying the evolutionary trade-offs in sexual selection, as the calls that attract more females also draw predatory bats.
insights Ranking position
Tungara Frog ranks #44 of 213 in the Amphibian ranking, behind Giant Waxy Monkey Tree Frog, ahead of Spanish Ribbed Newt.
help Tungara Frog FAQ
What does a túngara frog's whine and chuck call mean?
Every male call begins with a descending whine, and the male may add one or more chuck sounds. Female frogs generally find the complex whine-chuck call more attractive than the whine alone.
Why do male túngara frogs risk adding chucks to their calls?
Chucks improve a male's chances of attracting a mate, but they also make him easier for predators to locate. Fringe-lipped bats, Trachops cirrhosus, listen for these calls while hunting.
Why is Engystomops pustulosus important in sexual selection research?
Its adjustable mating call lets researchers test how female preferences, male competition, and predation interact. Michael Ryan's work on the species became a major case study in the evolution of animal communication.
Where do túngara frogs lay their eggs?
Pairs produce floating foam nests in temporary pools and other shallow water. The foam helps protect the developing eggs while reducing the danger posed by aquatic predators.
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