Data Zone
| Scientific name | Common name | Family | Red List category |
|---|---|---|---|
| Mergus octosetaceus | Brazilian Merganser | Anatidae (Ducks, Geese, Swans) | CR |
| Mergus merganser | Goosander | Anatidae (Ducks, Geese, Swans) | LC |
| Mergus australis | New Zealand Merganser | Anatidae (Ducks, Geese, Swans) | EX |
| Mergus serrator | Red-breasted Merganser | Anatidae (Ducks, Geese, Swans) | LC |
| Mergus squamatus | Scaly-sided Merganser | Anatidae (Ducks, Geese, Swans) | EN |