Howler Monkey

Alouatta caraya - There can be as many as twenty howler monkeys in a troop. When resting, the monkey’s tail is always tightly curled around a branch. They tend to avoid long leaps from tree branches, but they can leap as far as fifteen feet if they want to.
Interesting fact: The howler monkey is the loudest land animal. Its call can be heard up to three miles away.

Jaguar

Panthera onca- Jaguars belong to the family Felidae, which includes 36 species of cats. Jaguars are classified under the genus Panthera which includes four species of "big cats", the jaguar, tiger, lion and leopard. Jaguars, like most species of cats, are solitary animals who occupy large areas of land. Silent Solitary Stalkers; Jaguars are nocturnal hunters, and do most of their stalking on the ground.
Interesting fact: Jaguar is from the American Indian word meaning "killer that takes its prey in a single bound!"