4. Howler Monkey
Are the loudest of all New World monkeys. They can be commonly found in Costa Rica. Howler monkey usually vocalizes at dusk and these vocalizations are used to mark territory and communicate with other monkeys.
5. Green Vine snake
Is one of the most beautiful and deadly snakes of Costa Rica.
Similar in appearance to a turkey. Male Great Curassow is black with yellow knob while female is orange brown color.