Circus aeruginosus
Western Marsh Harrier
Circus approximans
Swamp Harrier
Circus hudsonius
Northern Harrier
Taxonomic hierarchy
- Casuariiformes
- Anseriformes
- Galliformes
- Columbiformes
- Cuculiformes
- Caprimulgiformes
- Podargidae
- Apodiformes
- Gruiformes
- Charadriiformes
- Phoenicopteriformes
- Podicipediformes
- Gaviiformes
- Sphenisciformes
- Procellariiformes
- Ciconiiformes
- Suliformes
- Pelecaniformes
- Cathartiformes
- Accipitriformes
- Strigiformes
- Bucerotiformes
- Coraciiformes
- Piciformes
- Falconiformes
- Psittaciformes
- Passeriformes
- Tyrannidae
- Menuridae
- Ptilonorhynchidae
- Climacteridae
- Maluridae
- Meliphagidae
- Pardalotidae
- Acanthizidae
- Pomatostomidae
- Campephagidae
- Psophodidae
- Vireonidae
- Pachycephalidae
- Oriolidae
- Artamidae
- Rhipiduridae
- Monarchidae
- Laniidae
- Corvidae
- Callaeidae
- Notiomystidae
- Petroicidae
- Paridae
- Alaudidae
- Cisticolidae
- Hirundinidae
- Pycnonotidae
- Phylloscopidae
- Aegithalidae
- Sylviidae
- Zosteropidae
- Regulidae
- Sittidae
- Certhiidae
- Polioptilidae
- Troglodytidae
- Sturnidae
- Mimidae
- Turdidae
- Muscicapidae
- Bombycillidae
- Ptiliogonatidae
- Estrildidae
- Prunellidae
- Passeridae
- Motacillidae
- Fringillidae
- Emberizidae
- Passerellidae
- Icteriidae
- Icteridae
- Parulidae
- Cardinalidae