The rich diversification of the islands, the mountainous relief of the mainland of St. Vincent, with its black sand volcanic beaches, and the numerous islets of the Grenadines an impressive amount of biotopes, both in number and variety. Moreover, the relatively old geological separation of the islands from the mainland results in a large amount of endemic species in the Grenadines. In particular on Union Island there is the endangered endemic gecko, the Gonatodes Dodini, and the Pink Rhino Iguana.
There are Important Birding Areas in the Grenadine islands, in particular the islands of Battowia and Petit Canouan are hosts to thousands of resident birds. On Battowia you can find the Red Footed Booby and the Magnificent Frigate Bird. On Petit Canouan there are thousands of laughing gulls, Roseate Terms and Magnificent frigate. These bird islands are under threat from poachers and greater protection is needed of these bird habitats.
In the forest mountain range of St. Vincent you can find the vulnerable parrot the Amazona Guildingi and the endangered endemic whistling warbler.