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.