Breeds in Alaska and western Canada, wintering along coastal southern Alaska, British Columbia and northern USA; also several resident populations in several states of north-western USA, mostly from reintroductions.
Trumpeter Swan (Cygnus buccinator) [XC104391]
by Bruce Lagerquist from Browns Lake, Beltrami Island State Forest, Lake of the Woods Co., Minnesota, United States (call)
Trumpeter Swan (Cygnus buccinator) [XC712004]
by Matthew Spoor from Sac Bay Park,Fairbanks Township (near Garden), Delta County, Michigan, United States (call)
Subspecies
Sometimes considered a subspecies of Whooper Swan (Cygnus cygnus), with which it forms a superspecies.