Coquí is the common name for several species of small frogs endemic to the archipelago of Puerto Rico and the Virgin Islands, onomatopoeically named for the loud sound (sometimes reaching as high as 100 dB) the males make at night, even though only two species make the sound "coqui", the common coqui and the mountain coqui. The Common Coquí is the unofficial symbol of Puerto Rico.
Coquís belong to the Eleutherodactylus genus which in Greek means free toes. The Eleutherodactylus genus contains over 700 different frog species which occur in southern United States, Central America, South America, and the Caribbean.
There are 17 described species of coquís in Puerto Rico. In 2007 a new species, the Coquí Llanero, was officially named Eleutherodactylus juanariveroi.