Near the Interpretation center of the Natural Reserve we find two trekking trails. Visitors can take a pleasant walk along them to feel closer to the marshes!

The trail where the Howler Monkeys are is easily recognizable because the howling can be heard from a very long distance. These Monkeys' live on tall, very leafy trees, so you'll have to be very attentive to discover them. However they can be easily photographed when they stop to play on the branches and pose on top of the trees. It is very common to find butterflies and variety of orchids along the way.

The Howler Monkeys are very noisy. Their fur is very distinctive and represent their genre, the yellow ones are female while the black ones males.