Close to the Carara Biological Reserve we find the Tarcoles River, home to a wide variety of birds and crocodiles. A trip down stream will show you the Guacalillo Mongroves, nesting place for the Scarlett Macaw and on both sides of the river bank you will see numerous species of birds such as: Pelicans, Opreys, Frigates, Trogons, etc. Very spectacular are the Crocodiles, some measuring up to 23 feet long. Take pictures of your guide hand feeding one of those enormous creatures.