Saint Giles Island is the largest in a group of small islands off the north-eastern tip of Tobago, in the Caribbean country of Trinidad and Tobago.
The island is very steep sided and hosts tropical dry forest and wind-swept littoral scrub.
The remaining four are lizards - green iguanas, turnip-tailed geckos, eyespot geckos and an unidentified species of skink in the sub-family Mabuyinae.
Saint Giles, along with adjacent rock islets, has been designated an Important Bird Area (IBA) by BirdLife International because it supports significant populations of red-billed tropicbirds, Audubon's Shearwaters and magnificent frigatebirds, as well as red-footed, brown and masked boobies.
It is one of the most important seabird breeding islands in the southern Caribbean.