The Trinidad and Tobago moist forests ecoregion (WWF ID: NT0171) covers most of Trinidad Island and Tobago Island near the coast of South America where the southeastern Caribbean Sea meets the Atlantic Ocean.

Small portions of the islands around river estuaries and coastal lowlands are mangroves or dry forests.

There are a few scattered mangroves of the Trinidad mangroves ecoregion at the main river estuaries, a ring of dry forest of the Trinidad and Tobago dry forests ecoregion around the Caroni Swamp, just south of the capital city of Port of Spain, and a small section of dry forest at the northeast end of Tobago.

[5][6] The island of Trinidad is only 20 km from the mainland of South America, and a land bridge existed as late as 1,500 years ago.

Also reported 100 species of mammals (bats and rodents predominate), 400 of birds, 85 of reptiles, and 30 of amphibians.