Any one of several aquatic, wed-footed, northern birds of the genus Urinator (formerly Colymbus), noted for their expertness in diving and swimming under water. The common loon, or great northern diver (Urinator imber, or Colymbus torquatus), and the red-throated loon or diver (Urinator septentrionalis), are the best known species. See Diver.

large somewhat primitive fish-eating diving bird of the northern hemisphere having webbed feet placed far back; related to the grebes

an aquatic bird that sort of resembles a duck

an excellent swimmer and diver, chasing and eating fish below water

a species of bird of the family Gaviidae

a total water bird

The voice of the wilderness, in summer anyway. A circumpolar diving bird ( Gavia immer) known in Britain as the Great Northern Diver. Mag in the Ojibwe.

The Loons (N.Am.) or Divers (UK) are a group of aquatic birds found in many parts of North America and northern Europe. A loon is the size of a large duck or small goose, which it somewhat resembles in shape when swimming, but they are completely unrelated to waterfowl. Their plumage is largely black-and-white, with grey on the head and neck in some species, and a white belly, and they have a spear-shaped bill.