Squirrel monkeys are sure to greet you from the tree canopies during your walk into Janauari Ecological Park. This adorable, beige and orange creature measures up to 13 inches with an even longer tail. They live together in large groups. Expect many of them to race and jump among the branches while you stroll by. The squirrel monkeys at the park entrance have become accustomed to tourists and may aggressively seek a handout.