The Probert Encyclopaedia of Nature

OSPREY

The osprey (Pandion haliaetus), also known as the fish hawk, is a large hawk and only member of the family Pandionidae. Unlike those of the other raptors, the anterior and hind toes are the same length, the outer toe being reversible like that of an owl, which is of great advantage in grasping prey. It seeks its prey by circling above the water and on sighting it hovers a moment before plunging down after it. The mainstay of its diet is fish, though it also eats other food.
Research Osprey