Subclasse Neornithes
Paleognathae:
- Struthioniformes—estruços, emús, kiwis i similars
- Tinamiformes—tinamús
- Anseriformes—ànecs, oques, cignes i similars
- Galliformes—paons, galls, galls dindis, faisans i similars
- Charadriiformes—gavines, turnícids, corriols i similars
- Gaviiformes—calàbries
- Podicipediformes—cabussets i cabussons
- Procellariiformes—albatrossos, petrells i similars
- Sphenisciformes—pingüins
- Pelecaniformes—pelicans i similars
- Phaethontiformes—faetons
- Ciconiiformes—cigonyes i similars
- Cathartiformes—voltors del Nou Món
- Phoenicopteriformes—flamencs
- Falconiformes—falcons, àguiles, aligots i similars
- Gruiformes—grues i similars
- Pteroclidiformes—gangues i xurres
- Columbiformes—coloms
- Psittaciformes—lloros i similars
- Cuculiformes—cucuts i turacs
- Opisthocomiformes—hoatzin
- Strigiformes—mussols i òlibes
- Caprimulgiformes—enganyapastors i similars
- Apodiformes—falciots i colibrís
- Coraciiformes—alcions, blauets i similars
- Piciformes—picots i similars
- Trogoniformes—trogons
- Coliiformes—colis
- Passeriformes—passerins