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Crotophaga
genus, birds
Nucleotide Protein
Regulus
Tyrannidae
family, birds
Buteo
(hawks), genus, hawks & eagles
Gaviiformes
(loons), order, birds
Gaviidae
(loons), family, birds
Opisthocomiformes
(hoatzins), order, birds
Opisthocomidae
(hoatzins), family, birds
Opisthocomus
Podicipediformes
(grebes), order, birds
Podicipedidae
(grebes), family, birds
Procellariiformes
(petrels and albatrosses), order, birds
Strigiformes
(owls), order, birds
Strigidae
Crotophagidae
Spheniscidae
(penguins), family, birds
Strix
Gavia
Podiceps
Eudyptula
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