The Coqui.
So, what's the deal with the Frog on this site? On the island of Puerto Rico there is a unique species of tree frogs known as the Coqui. The total family of these tree frogs consists of 16 different native species. Eleven of the 16 are endemic species. That is, they occur only in Puerto Rico. The Coqui is a very popular creature throughout the island because it harmonizes the evening with its graceful melody. The people on the island love to listen to the Coqui sing at bedtime and its melody is dearly missed by the Puerto Ricans that are away from home. The name "Coqui" comes from the song that the male of the species is often heard singing. What it seems to say is: "Ko-Kee, Ko-Kee". That's why it is called the "Coqui" in Spanish. The Coquies begin to sing at sunset and sing all night long until dawn when they stop singing and head for their nest. In almost all the towns and countrysides of the island you can find that the species "Eleutherodactylus Coqui" has a slower chant, While the other specie "Eleutherodactylus Portoricensis" sings faster with a higher tone and is found in the mountains. The unique chant of the Coqui serves two purposes. The First syllable "co" (Ko) which reaches 1,160 Hertz is for warning nearby males, a "Go Away" message. And the second syllable "Qui" (Kee) which reaches 2,090 Hertz is used to invite the female to reproductive activity. Only males call during courtship, although both sexes vocalize aggressively against intruders that enter their territory. Males typically call during courtship from 1-2 meters above the ground while sitting on a leaf. The female Coqui travels long distances to answer the male's calling. The experience of the Coqui song is quite unique and found nowhere else on the planet. Although some Coquies have been successfully exported to other countries, they can never sing once removed from THE ISLAND OF PUERTO RICO.