accipitriformes african grey parrot anseriformes apodiformes archaeopteryx avian brain nomenclature consortium avian incubation aviculture bird bird anatomy bird collections bird conservation bird evolution bird feeding bird flight bird hybrid bird migration bird nest bird ringing bird vision bird vocalization birdcage birdwatching brood parasite caprimulgiformes charadriiformes ciconiiformes columbiformes coraciiformes cormorant corvidae cuckoo cuculiformes enantiornithes falconiformes feather flamingo galliformes grebe gruiformes hesperornithes intelligence japan late quaternary prehistoric birds list of birds list of extinct birds list of fossil birds lists of birds by region little green bee-eater loon mammal modern birds mousebird new caledonian crow nidopallium ornithology owl parrot passerine pelecaniformes penguin piciformes pigeon intelligence plumage procellariiformes ratite red-backed fairy-wren sandgrouse seabird seriema sibley-ahlquist taxonomy striated heron sulphur-crested cockatoo superb fairy-wren tinamou trogon tropicbird uropygial gland woodpecker finch