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. The best-known species is the common coquí (E. coqui), which is both a national symbol of Puerto Rico and a notorious invasive species in Hawaii. Two Eleutherodactylus species, E. limbatus and E. iberia, are among the smallest known frogs, measuring only 8.5 mm in length (only slightly larger than Paedophryne amauensis, which measures around 7.7 mm). Source: Wikipedia (en)