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Psittaciformes
(parrots and others), order, birds
Nucleotide Protein
Corvus
(crows), genus, birds
Opisthocomus
genus, birds
Opisthocomidae
(hoatzins), family, birds
Opisthocomiformes
(hoatzins), order, birds
Gaviidae
(loons), family, birds
Gaviiformes
(loons), order, birds
Buteo
(hawks), genus, hawks & eagles
Ardea
(great herons), genus, birds
Aythya
Corvidae
family, birds
Psittacus
Trochilidae
(hummingbirds), family, birds
Spheniscidae
(penguins), family, birds
Sphenisciformes
(penguins), order, birds
Psittacidae
(parrots), family, birds
Fregatidae
(frigatebirds), family, birds
Picidae
(woodpeckers), family, birds
Piciformes
(woodpeckers and others), order, birds
Phoenicopterus
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