| Class AVES | | Eduardo de Juana |
| Order STRUTHIONIFORMES | | |
| - Family RHEIDAE (RHEAS) | | Anna Folch |
- Family CASUARIIDAE (CASSOWARIES) | | Anna Folch |
| - Family DROMAIIDAE (EMU) | | Anna Folch |
| - Family APTERYGIDAE (KIWIS) | | Anna Folch |
| Order TINAMIFORMES | | |
| - Family TINAMIDAE (TINAMOUS) | | José Cabot |
| Order SPHENISCIFORMES | | |
| - Family SPHENISCIDAE (PENGUINS) | | Isabel Martínez |
| Order GAVIIFORMES | | |
| - Family GAVIIDAE (DIVERS) | | Carles Carboneras |
| Order PODICIPEDIFORMES | | |
| - Family PODICIPEDIDAE (GREBES) | | Francesc Llimona & Josep del Hoyo |
| Order PROCELLARIIFORMES | | |
| - Family DIOMEDEIDAE (ALBATROSSES) | | Carles Carboneras |
| - Family PROCELLARIIDAE (PETRELS AND SHEARWATERS) | | Carles Carboneras |
| - Family HYDROBATIDAE (STORM-PETRELS) | | Carles Carboneras |
| - Family PELECANOIDIDAE (DIVING-PETRELS) | | Carles Carboneras |
| Order PELECANIFORMES | | |
| - Family PHAETHONTIDAE (TROPICBIRDS) | | Jaume Orta |
| - Family PELECANIDAE (PELICANS) | | Andrew Elliott |
| - Family SULIDAE (GANNETS AND BOOBIES) | | Carles Carboneras |
| - Family PHALACROCORACIDAE (CORMORANTS) | | Jaume Orta |
| - Family ANHINGIDAE (DARTERS) | | Jaume Orta |
| - Family FREGATIDAE (FRIGATEBIRDS) | | Jaume Orta |
| Order CICONIIFORMES | | |
| - Family ARDEIDAE (HERONS) | | Albert Martínez-Vilalta & Anna Motis |
| - Family SCOPIDAE (HAMERKOP) | | Andrew Elliott |
| - Family CICONIIDAE (STORKS) | | Andrew Elliott |
| - Family BALAENCIPITIDAE (SHOEBILL) | | Andrew Elliott |
| - Family THRESKIORNITHIDAE (IBISES AND SPOONBILLS) | | Eloïsa Matheu & Josep del Hoyo |
| Order PHOENICOPTERIFORMES | | |
| - Family PHOENICOPTERIDAE (FLAMINGOS) | | Josep del Hoyo |
| Order ANSERIFORMES | | |
| - Family ANHIMIDAE (SCREAMERS) | | Carles Carboneras |
| - Family ANATIDAE (DUCKS, GEESE AND SWANS) | | Carles Carboneras |