Which aquatic bird is pictured?

Loons are a group of aquatic birds found in many parts of North America. Common Loons are large, diving waterbirds with rounded heads and dagger-like bills. In Summer, common loon adults are regally patterned in black and white. In winter, they are plain gray above and white below, and you’ll find them close to shore on most seacoasts and a good many inland reservoirs and lakes. They are powerful, agile divers that catch small fish in fast underwater chases. They are less suited to land and typically come ashore only to nest.

The Common Loon swims underwater to catch fish, propelling itself with its feet. It swallows most of its prey underwater. The loon has sharp, rearward-pointing projections on the roof of its mouth and tongue that help it keep a firm hold on slippery fish. Loons are water birds, only going ashore to mate and incubate eggs. Their legs are placed far back on their bodies, allowing efficient swimming but only awkward movement on land. Common Loons breed on quiet, remote freshwater lakes of the northern U.S. and Canada.