Trumpeter Swan cygnets hatched at Cleveland Metroparks Zoo. The largest North American bird, Trumpeter Swans vanished from most of the United Sates over 100 years ago due to over hunting and lead poisoning.
Trumpeter Swan (Cygnus buccinator), the largest native water fowl of North America. Males, called cobs, can weigh up to 35 lbs and have a wing span of as much as 7 ft. Females are slightly smaller and called pens. Juveniles are cygnets.