The coquí is a batracian having two separate toes with suckers. The zoological name of the species is Eleutherodactylus. More than 16 different species live in the island, 13 of which occur in the Caribbean National Forest. It is not web-footed and has no swimming membrane between its fingers and toes. The coquí - little frog -, as it is called in Puerto Rico, has only a minute tail when it is born, and this quickly disappears. Its length ranges between 15mm-80mm and the color of the coquí varies considerably, sometimes having touches of different colors or two dorsolateral stripes. One of the characteristics of the Puerto Ricans coquies is that is does not go through the intermediate phase of being a tadpole as other frogs do.