| Parent | Category | Figures | |
|---|---|---|---|
| 1 | Aythya | collaris | 8214 |
| 2 | Aythya | affinis | 5698 |
| 3 | Aythya | americana | 4591 |
| 4 | Aythya | marila | 3737 |
| 5 | Aythya | valisineria | 3487 |
| 6 | Aythya | fuligula | 2708 |
| 7 | Aythya | ferina | 1193 |
| 8 | Aythya | australis | 706 |
| 9 | Aythya | nyroca | 395 |
| 10 | Aythya | novaeseelandiae | 330 |
| 11 | Aythya | x | 58 |
| 12 | Aythya | baeri | 19 |
| 13 | Aythya | innotata | 1 |