Even though it has tropical forests, Vanuatu has a small number of plant and animal species. There are no large mammals. The 19 species of native reptiles include the flowerpot snake, found only on Efate. The Fiji Banded Iguana ("Brachylophus fasciatus") was introduced as a feral animal in the 1960s. There are 11 species of bats and 61 species of land and water birds.