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.
Photograph by Danny Brown Seven trumpeter swans swim in the early morning light in Riverlands Migratory Bird Sanctuary near West Alton, Missouri. Up to 400 trumpeter swans, North America’s largest native waterfowl, overwinter in the sanctuary.