The South American harpy eagle is considered one of the most powerful birds of prey. It is believed to be the heaviest eagle in the world. This eagle’s body length ranges from 90 to 110 cm. Its wingspan is about 2 m, which is shorter than that of eagles of comparable weight and height. This is because this eagle hunts in dense forests, where it must maneuver between trees and thick foliage when attacking its prey. The harpy eagle’s primary diet consists of sloths, small monkeys such as capuchins, and other mammals; its secondary diet includes reptiles and large birds.