Coqui are tree frogs and do not have webbed feet or any swimming membranes between their fingers or toes. Instead, they have disks or pads on the tips of their toes to help them cling or stick to slippery surfaces like slick leaves. The name coqui comes from the song that the male sings, which sounds like "Ko-kee, Ko-kee". They begin to sing at sunset and sing all night long. They sing to warn nearby males to go away (the "Ko" part) and to invite females closer (the "kee" part). Coqui frogs are special in that they do not go through metamorphosis like most amphibians do. Instead, they skip the tadpole stage and hatch from the egg looking just like little frogs. This also allows the parents not to have to lay their eggs on water like other amphibians. The coqui is so loved on its native island of Puerto Rico that it is the unoffical island mascot. They can be found painted on buildings, sung about in songs, wrote about in books and myths about the coqui have been handed down from generation to generation. One of these myths is that they will not survive off the island and lose their voice if removed. However, the Zoo has been caring for and breeding coqui's for several years now. Every morning the Keepers report they are singing away when they come in to work.