As wildlife and habitat have disappeared from the region, Cuba’s importance as an ecological bastion has steadily risen. As one scientist put it, Cuba is the “biological superpower” of the Caribbean. The island has the largest tracts of untouched rain forest, unspoiled reefs and intact wetlands in the Caribbean islands. Cuba also is home to many unique, or endemic, species, including the solenodon, a chubby insectivore that looks rather like a giant shrew, and the bee hummingbird, the world’s smallest bird, weighing less than a penny.