Loon

Loon, waterbird (family Gaviidae) of northern countries, known in England as the diver. These birds have webbed feet set well back on their bodies and are very ungainly on land. They are best known for their eerie, wailing calls. They make their nests on the edges of ponds, and the chicks sometimes ride on their parents' backs. They catch fish by diving, sometimes below 200 ft (61 m).