Picture: I'll swing in my blue jeans

A blue jeans dart frog is captured on film at La Selva biological station in Sarapiqui, 130km north of San Jose, Costa Rica.

More than 250 scientists from 25 countries and international students come to La Selva to study tropical ecology every year. Species available for study in their natural habitat include more than 330 species of trees and 43 species of birds.