Ospreys use one reversible toe to help them catch fish.

Who needs a fishing pole when you have reversible claws? Ospreys are powerful birds of prey that specialize in hunting fish — and their feet are perfectly adapted to the job. Unlike most birds, which have three toes pointing forward and one backward, ospreys can rotate one of their forward-facing toes backward. This gives them two toes in front and two behind, creating a strong, balanced grip. Their toes also have rough, barbed pads called spicules that help them hold onto slippery prey.

Ospreys hunt fish almost exclusively, and their adapted feet help them keep hold of their catch as they leave the water. After grabbing a fish, an osprey positions it headfirst between its talons, which reduces wind resistance as it flies. Ospreys can carry surprisingly large fish and sometimes fly considerable distances before they enjoy their prey.