Anseriformes
- Anatidae
| Common name | Binomial | Status |
|---|---|---|
| Fulvous Whistling-Duck | Dendrocygna bicolor | Outlying islands only |
| Mute Swan | Cygnus olor | |
| Tundra Swan | Cygnus columbianus | |
| Whooper Swan | Cygnus cygnus | |
| Bean Goose | Anser fabalis | |
| Pink-footed Goose | Anser brachyrhynchus | Outlying islands only |
| White-fronted Goose | Anser albifrons | |
| Greylag Goose | Anser anser | |
| Snow Goose | Anser caerulescens | Outlying islands only |
| Barnacle Goose | Branta leucopsis | Rare/Accidental |
| Brent Goose | Branta bernicla | Rare/Accidental |
| Ruddy Shelduck | Tadorna ferruginea | Rare/Accidental |
| Common Shelduck | Tadorna tadorna | |
| Wood Duck | Aix sponsa | Introduced species |
| Wigeon | Anas penelope | |
| American Wigeon | Anas americana | |
| Gadwall | Anas strepera | |
| Common Teal | Anas crecca | |
| Mallard | Anas platyrhynchos | |
| American Black Duck | Anas rubripes | Outlying islands only |
| Northern Pintail | Anas acuta | |
| Garganey | Anas querquedula | |
| Blue-winged Teal | Anas discors | Rare/Accidental |
| Northern Shoveler | Anas clypeata | |
| Marbled Teal | Marmaronetta angustirostris | Rare/Accidental Vulnerable |
| Red-crested Pochard | Netta rufina | |
| Common Pochard | Aythya ferina | |
| Ring-necked Duck | Aythya collaris | Rare/Accidental |
| Ferruginous Duck | Aythya nyroca | Near-threatened |
| Tufted Duck | Aythya fuligula | |
| Greater Scaup | Aythya marila | |
| Lesser Scaup | Aythya affinis | Rare/Accidental |
| Common Eider | Somateria mollissima | Rare/Accidental |
| Steller's Eider | Polysticta stelleri | Rare/Accidental |
| Long-tailed Duck | Clangula hyemalis | Rare/Accidental |
| Common Scoter | Melanitta nigra | |
| Surf Scoter | Melanitta perspicillata | Rare/Accidental |
| Velvet Scoter | Melanitta fusca | |
| Bufflehead | Bucephala albeola | Rare/Accidental |
| Common Goldeneye | Bucephala clangula | |
| Smew | Mergellus albellus | |
| Red-breasted Merganser | Mergus serrator | |
| Goosander | Mergus merganser | |
| Ruddy Duck | Oxyura jamaicensis | Introduced species |
| White-headed Duck | Oxyura leucocephala | Endangered |
Read more about this topic: List Of Birds Of Portugal