are loons solitary birds
Loon is a carnivore (meat-eater). Its diet is based on fish (such as gulf menhaden, perch, trout), crabs, lobsters, shrimps, mollusks and insects. Natural enemies of loons are gulls, ravens, crows, turtles, raccoons, otters, skunks and weasels. Loon is solitary bird. It occasionally gathers in small groups (of up to 20 birds) during the summer and autumn. Loons produce yodel calls to announce occupation of a territory during the breeding season. Tremolo calls (which sound like maniacal laughter) are sign of aggression.