We are walking a trail to the beach at Charco Verde Park on Isla de Ometepe, Nicaragua when I see that a few mangoes are dropping out of the tree. Otherwise there are no sounds, at first. Then I hear movement to one side, high in the tree. We crane our necks around until we finally see a howler monkey. Eventually I see at least eight. There could have been more, but most of them were taking a siesta and it was easy for them to blend in. Their deep voices can be heard up to 3 miles away.
Range: Costa Rica, Nicaragua, Honduras, Guatemala
Weight: Males up to 21.8 lbs. Females up to 16.8 lbs.
Height: Males – 20″ to 26.6″; females – 18.9″ to 24.9″
Prehensile tail: 21.5″ to 25.8″
Social structure: live in groups of 10-20 individuals and at puberty leave the group to join another