The harpy is one of the largest species of eagle. As is often the case with birds of prey, females are larger than males. The birds can grow to 36 to 40 inches. Females weigh between 13 to 20 pounds.

Harpy eagles feed on a large variety of Neotropical mammals ranging from sloths to monkeys to coatis. While the Americas are rife with all sorts of fearsome birds of prey—the golden eagle, Cooper's ...