Green CayGreen Cay is an uninhabited island of the British Virgin Islands in the Caribbean. It sits between the eastern tip of Little Jost Van Dyke and Tortola. It is in area.EnvironmentThe island, with its surrounding waters, has been designated an Important Bird Area by BirdLife International because it supports a large nesting colony of roseate terns. The island also provides habitat for the Puerto Rican racer, the crested anole, and the big-scaled least gecko.