Hear that guttural roar echoing across the treetops? Although it sounds like a jaguar (or worse!) to new Central America travelers, it's probably a howler monkey. Howlers are the loudest land animal – their calls can be heard as far away as three miles. Central America is also home to the Central American squirrel monkey (in parts of Costa Rica and Panama), spider monkeys, and capuchins, considered the smartest of the New World monkeys.
Capuchins have been known to crush millipedes and rub them on their backs as natural mosquito repellent.
Where you can find them:
Most of the jungles and forests in Central America. Great bets are Manuel Antonio National Park in Costa Rica, Tikal National Park in Guatemala, and the Community Baboon Sanctuary in Belize.