El yunque national forest, Puerto Rico

The only tropical rainforest in the USA national forest system, it isn’t particularly large, only covering an area around 50 square miles; however it is also one of the most biologically diverse.

There are multiple species of hummingbird that live in the forests, along with a Puerto Rican woodpecker and parrot. There are 11 different species of lizard within the reserve. There are 9 species of bat, which is the only native mammal species left on Puerto Rico. Small Indian mongooses also live in the reserve having been introduced from their home in 1877.