Harrier (bird)

A harrier is a member of the genus Circus in Accipitridae, a family of birds of prey. Harriers characteristically hunt by flying low over open ground, feeding on small mammals, reptiles, or birds. The young of the species are sometimes referred to as ring-tail harriers. They are distinctive with long wings, a long narrow tail, the slow and low flight over grasslands and skull peculiarities. The harriers are thought to have diversified with the expansion of grasslands and the emergence of C₄ grasses about 6 to 8 million years ago during the Late Miocene and Pliocene.