What is the largest species of the waterfowl family?
The trumpeter swan is the heaviest living bird native to North America, and the largest extant species of waterfowl with a wingspan that may exceed 3 m. The largest known male trumpeter attained a length of 183 cm, a wingspan of 3.1 m, and a weight of 17.2 kg. The largest numbers of breeding pairs are found in Alaska.