tortuguero national park is home to spider, howler, and white-throat capuchin monkeys. it is also the home of three-toed sloth and two-toed sloth. it has 320 species of birds and many reptiles. there is an annual nesting of the endangered green turtle, and is the most important nesting site for the species. giant leatherback, hawksbill, and loggerhead turtles also nest here.