The Trumpeter Swan is the largest of all North American Swan species with a wingspan of 185 to 250 cm, so it is the heaviest flying bird in the world. We have smaller Swans in Eurasia like Whooper Swan or Tundra Swan and some authorities considered them as the same species. The adult Trumpeter Swan’s plumage is entirely white, cygnets are usually pale grey. They are loud with their cry sounding similar to a trumpet, which gave the bird its name. Like other Swans, they often mate for life and if his mate dies, a male Trumpeter Swan may not pair again for the rest of his life. As I know, these big, palatial birds are the symbol of marital fidelity in cross-stitching, so stitchers often choose them as a gift for a wedding.