Small and slender loon. Winters primarily in saltwater, but can use large lakes and reservoirs in migration. In winter, white below and gray above with fine white spots. In summer, note smooth gray head, brick-red throat, white chest, and dark body. Dives frequently, feeding on fish. Look closely at shape: slender neck and thin bill usually held at an upward angle. Breeds in the Arctic. Sometimes gathers in loose flocks where food is plentiful.