Distribution: Haiti, the Dominican Republic, Cuba , Puerto Rico and some of the other Carribbean islands. Size: 28 - 48 in. (0.71 - 1.2 m). Diet and Habitat: These lizards live on dry rocky ground among cactuses and thorny bushes. These shy, agile creatures live in burrows and feed almost entirely on plants and berries. They tend to begin life as carnivores and shift to being herbivores as adults. The rhinoceros iguana is an endangered species because of the destruction of its habitat and the introduction of unnatural predators. Dogs, cats, mongoose, pigs, goats and rabbits pose the greatest threat to survival of the rhinoceros iguana in its natural environment.