The Tempisque River's dry tropical forest is an important habitat for several different species of monkeys, crocodiles, iguanas, and migratory and aquatic birds such as the roseate spoonbill, white ibis, greets egret, little blue heron, tricoled heron, and bare throated tiger heron. The variety of birds in this region is the most extensive in the entire country.

The southern leg of the river passes through the Palo Verde National Park, a legitimate bird watching paradise, encompassing mangroves, swamp and both fresh water and salt water lagoons. It is a calm, relaxing float through one of Costa Rica’s prized national parks, an unforgettable experience.