on palm trees or in potted plants, which can aid in their spread. Life cycle As with most frogs, female Cuban tree frogs are larger than males. During the breeding season, the male will have a black nuptial pad on his hand or wrist that helps him hold onto the female during amplexus. Cuban tree frogs breed year round depending on the conditions, preferring to breed during the wetter months. Optimal conditions are considered to be with high humidity (97.8%) and rain. A female can lay several hundred eggs to over a thousand in a single clutch. Eggs can hatch in under 30 hours and tadpoles can fully develop in one month. They have wide caudal fins and two rows of labial teeth on the top of their mouths and four rows on the bottom. Tadpoles survive on algae and will occasionally eat other tadpoles, and on rare occasions, recently metamorphosed juveniles. After metamorphosis, froglets are between long. Distribution The Cuban tree frog is native to Cuba, the Bahamas, and the Cayman Islands. This large frog has been introduced in Puerto Rico, the US Virgin Islands, and the British Virgin Islands. Whether the species was native to the Key West region of Florida is debated, or if it was introduced to the area. First discovered in the 1930s, these frogs arrived via cargo ships in the 1800s. They can survive in brackish water, which may have helped the species to spread to various islands. The Cuban tree frogs' progressive colonization into the mainland of Florida is believed to be abetted by use of State Road A1A construction during the 1940s. The species is now established in southern Florida and parts of the panhandle region, and can be found as far north as South Carolina. The Cuban tree frog is known to hitchhike on shipments of potted plants, vegetation, packaging, boats, and other motorized vehicles. Once in a new location, the frogs become an invasive species. In Puerto Rico, they have become a predator of the common coquí (Eleutherodactylus coqui). They have several good colonizing traits, such as high fecundity, short generation time, a diverse diet, good competitive ability, and the ability to coexist with humans. In addition, they also secrete a toxic mucus from their skin which helps to limit the number of natural predators. Cuban tree frogs are known to inhabit a variety of habitats, including estuaries, low-density suburban