Class
Aves Mammalia Reptilia Amphibia Insecta Arachnida Malacostraca

Family
All families Ostriches (Struthionidae) Rheas (Rheidae) Kiwis (Apterygidae) Cassowaries, Emu (Casuariidae) Tinamous (Tinamidae) Screamers (Anhimidae) Magpie Goose (Anseranatidae) Ducks, Geese, Swans (Anatidae) Megapodes (Megapodiidae) Chachalacas, Curassows, Guans (Cracidae) Guineafowl (Numididae) New World Quail (Odontophoridae) Pheasants and Allies (Phasianidae) Loons (Gaviidae) Penguins (Spheniscidae) Austral Storm Petrels (Oceanitidae) Albatrosses (Diomedeidae) Petrels, Shearwaters, Diving Petrels (Procellariidae) Grebes (Podicipedidae) Flamingos (Phoenicopteridae) Tropicbirds (Phaethontidae) Storks (Ciconiidae) Ibises, Spoonbills (Threskiornithidae) Herons, Bitterns (Ardeidae) Hamerkop (Scopidae) Pelicans (Pelecanidae) Frigatebirds (Fregatidae) Gannets, Boobies (Sulidae) Cormorants, Shags (Phalacrocoracidae) Anhingas, Darters (Anhingidae) New World Vultures (Cathartidae) Ospreys (Pandionidae) Kites, Hawks, Eagles (Accipitridae) Bustards (Otididae) Seriemas (Cariamidae) Sunbittern (Eurypygidae) Flufftails (Sarothruridae) Finfoots (Heliornithidae) Rails, Crakes and Coots (Rallidae) Cranes (Gruidae) Limpkin (Aramidae) Buttonquail (Turnicidae) Stone-curlews, Thick-knees (Burhinidae) Sheathbills (Chionidae) Magellanic Plover (Pluvianellidae) Oystercatchers (Haematopodidae) Ibisbill (Ibidorhynchidae) Stilts, Avocets (Recurvirostridae) Plovers (Charadriidae) Painted-snipes (Rostratulidae) Jacanas (Jacanidae) Plains-wanderer (Pedionomidae) Seedsnipes (Thinocoridae) Sandpipers, Snipes (Scolopacidae) Coursers, Pratincoles (Glareolidae) Gulls, Terns and Skimmers (Laridae) Skuas (Stercorariidae) Auks (Alcidae) Sandgrouse (Pteroclidae) Pigeons, Doves (Columbidae) Hoatzin (Opisthocomidae) Turacos (Musophagidae) Cuckoos (Cuculidae) Barn Owls (Tytonidae) Owls (Strigidae) Frogmouths (Podargidae) Potoos (Nyctibiidae) Nightjars (Caprimulgidae) Owlet-nightjars (Aegothelidae) Treeswifts (Hemiprocnidae) Swifts (Apodidae) Hummingbirds (Trochilidae) Mousebirds (Coliidae) Trogons (Trogonidae) Rollers (Coraciidae) Kingfishers (Alcedinidae) Motmots (Momotidae) Bee-eaters (Meropidae) Hoopoes (Upupidae) Wood Hoopoes (Phoeniculidae) Ground Hornbills (Bucorvidae) Hornbills (Bucerotidae) Jacamars (Galbulidae) Puffbirds (Bucconidae) New World Barbets (Capitonidae) Toucan Barbets (Semnornithidae) Toucans (Ramphastidae) Asian Barbets (Megalaimidae) African Barbets (Lybiidae) Honeyguides (Indicatoridae) Woodpeckers (Picidae) Caracaras, Falcons (Falconidae) New Zealand Parrots (Strigopidae) Cockatoos (Cacatuidae) African & New World Parrots (Psittacidae) Old World Parrots (Psittaculidae) Broadbills (Eurylaimidae) Pittas (Pittidae) Ovenbirds (Furnariidae) Antbirds (Thamnophilidae) Antthrushes (Formicariidae) Antpittas (Grallariidae) Gnateaters (Conopophagidae) Tapaculos (Rhinocryptidae) Tyrant Flycatchers, Calyptura (Tyrannidae) Cotingas (Cotingidae) Manakins (Pipridae) Tityras, Becards, Sharpbill (Tityridae) Bowerbirds (Ptilonorhynchidae) Australasian Treecreepers (Climacteridae) Australasian Wrens (Maluridae) Honeyeaters (Meliphagidae) Pardalotes (Pardalotidae) Australasian Warblers (Acanthizidae) Australasian Babblers (Pomatostomidae) Logrunners (Orthonychidae) New Zealand Wattlebirds (Callaeidae) Stitchbird (Notiomystidae) Whipbirds, Jewel-babblers, Quail-thrushes (Psophodidae) Wattle-eyes, Batises (Platysteiridae) Bushshrikes (Malaconotidae) Boatbills (Machaerirhynchidae) Vangas and Allies (Vangidae) Woodswallows, Butcherbirds and Allies (Artamidae) Ioras (Aegithinidae) Cuckooshrikes (Campephagidae) Whiteheads (Mohouidae) Sittellas (Neosittidae) Australo-Papuan Bellbirds (Oreoicidae) Whistlers and allies (Pachycephalidae) Shrikes (Laniidae) Vireos, Greenlets & Shrike-babblers (Vireonidae) Figbirds, Orioles & Turnagra (Oriolidae) Drongos (Dicruridae) Fantails (Rhipiduridae) Monarchs (Monarchidae) Crows, Jays (Corvidae) Australian Mudnesters (Corcoracidae) Birds-of-paradise (Paradisaeidae) Australasian Robins (Petroicidae) Rockjumpers (Chaetopidae) Silky-flycatchers (Ptiliogonatidae) Fairy Flycatchers (Stenostiridae) Tits, Chickadees (Paridae) Penduline Tits (Remizidae) Nicators (Nicatoridae) Bearded Reedling (Panuridae) Larks (Alaudidae) Bulbuls (Pycnonotidae) Swallows, Martins (Hirundinidae) Cupwings (Pnoepygidae) Crombecs, African Warblers (Macrosphenidae) Cettia Bush Warblers and Allies (Cettiidae) Streaked Scrub Warbler (Scotocercidae) Bushtits (Aegithalidae) Leaf Warblers and Allies (Phylloscopidae) Reed Warblers and Allies (Acrocephalidae) Grassbirds and Allies (Locustellidae) Cisticolas and Allies (Cisticolidae) Babblers, Scimitar Babblers (Timaliidae) Fulvettas, Ground Babblers (Pellorneidae) Laughingthrushes and Allies (Leiothrichidae) Sylviid Babblers (Sylviidae) White-eyes (Zosteropidae) Sugarbirds (Promeropidae) Fairy-bluebirds (Irenidae) Wrens (Troglodytidae) Gnatcatchers (Polioptilidae) Nuthatches (Sittidae) Treecreepers (Certhiidae) Mockingbirds, Thrashers (Mimidae) Starlings, Rhabdornis (Sturnidae) Oxpeckers (Buphagidae) Thrushes (Turdidae) Chats, Old World Flycatchers (Muscicapidae) Dippers (Cinclidae) Leafbirds (Chloropseidae) Flowerpeckers (Dicaeidae) Sunbirds (Nectariniidae) Old World Sparrows, Snowfinches (Passeridae) Weavers, Widowbirds (Ploceidae) Waxbills, Munias and Allies (Estrildidae) Indigobirds, Whydahs (Viduidae) Olive Warbler (Peucedramidae) Wagtails, Pipits (Motacillidae) Finches, Euphonias (Fringillidae) Buntings (Emberizidae) New World Sparrows (Passerellidae) Wrenthrush (Zeledoniidae) Oropendolas, Orioles, Blackbirds (Icteridae) New World Warblers (Parulidae) Mitrospingid Tanagers (Mitrospingidae) Cardinals, Grosbeaks and Tanager Allies (Cardinalidae) Tanagers and allies (Thraupidae) Shrike-tit (Falcunculidae)

Species
All species Lesser Rhea (Rhea pennata) Greater Rhea (Rhea americana)

The family Rheas (Rheidae)