Green Back Turtle, West Coast Barbados

Turtles are reptiles of the order Testudines (the crown group of the superorder Chelonia), characterised by a special bony or cartilaginous shell developed from their ribs that acts as a shield. "Turtle" may either refer to the Testudines as a whole, or to particular Testudines which make up a form taxon that is not monophyletic.

The order Testudines includes both extant (living) and extinct species. The earliest known turtles date from 215 million years ago, making turtles one of the oldest reptile groups and a more ancient group than lizards, snakes and crocodiles. Of the many species alive today, some are highly endangered.

Like other reptiles, turtles are ectotherms—their internal temperature varies according to the ambient environment, commonly called cold-blooded. However, leatherback sea turtles have noticeably higher body temperature than surrounding water because of their high metabolic rate.

Like other amniotes (reptiles, dinosaurs, birds, and mammals), they breathe air and do not lay eggs underwater, although many species live in or around water. The largest turtles are aquatic.

Barbados (ⁱ/bɑrˈbeɪdɒs/ or /bɑrˈbeɪdoʊs/) is an island country in the Lesser Antilles. It is 34 kilometres (21 mi) in length and as much as 23 kilometres (14 mi) in width, amounting to 431 square kilometres (166 sq mi). It is situated in the western area of the North Atlantic and 100 kilometres (62 mi) east of the Windward Islands and the Caribbean Sea; therein, it is about 168 kilometres (104 mi) east of the islands of Saint Vincent and the Grenadines, and 400 kilometres (250 mi) north-east of Trinidad and Tobago. Barbados is outside of the principal Atlantic hurricane belt.