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Chaetura
genus, birds
Nucleotide Protein
Pachyornis
Apterygiformes
(kiwis), order, birds
Apterygidae
family, birds
Apteryx
Neognathae
infraclass, birds
Anseriformes
(ducks, geese & swans), order, birds
Anatidae
(waterfowl), family, birds
Anser
(geese), genus, birds
Anseranas
Apodiformes
(swifts and hummingbirds), order, birds
Apodidae
(swifts), family, birds
Megalapteryx
Charadriiformes
(shorebirds & allies), order, birds
Ciconiiformes
(storks and others), order, birds
Ciconiidae
(storks), family, birds
Passeriformes
(song birds), order, birds
Neoaves
clade, birds
Spheniscidae
(penguins), family, birds
Aptenodytes
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