What is the largest species of the waterfowl family?

mute swan
whooper swan
tundra swan
trumpeter swan
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.
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Answers by country

mute swan
whooper swan
tundra swan
trumpeter swan
answers
flagthe United States
3%
10%
7%
78%
94
flagAustralia
6%
13%
6%
72%
29
flagGreece
0%
15%
15%
69%
13
flagSpain
0%
16%
16%
66%
12
flagAustria
16%
5%
25%
52%
36
flagFrance
10%
30%
20%
40%
10
flagGermany
32%
7%
20%
38%
168
flagIndia
15%
28%
23%
31%
80
flagPoland
23%
10%
34%
30%
1424
flagSwitzerland
28%
23%
14%
28%
21
flagRepublic of Ireland
9%
54%
18%
18%
11
flagthe United Kingdom
24%
29%
29%
17%
41