The common coquí, widely known as the coquí, is a species of frog native to Puerto Rico belonging to the family Eleutherodactylidae. The species is named for the loud call the males make at night, which serves two purposes; the "co" serves to repel other males and establish territory while the "quí" serves to attract females. The auditory systems of males and females respond preferentially to different notes of the male call, displaying sex difference in a sensory system. The common coquí is a very important aspect of Puerto Rican culture, and it has become an unofficial territorial symbol of Puerto Rico. The frog is also found elsewhere, and is usually considered an invasive species outside Puerto Rico.

Eleutherodactylus is a genus of frogs in the family Eleutherodactylidae. Many of the 200 species of the genus are commonly known as "rain frogs" or "robber frogs", due to their sharp, high-pitched, insect-like calls.