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Gaviiformes
(loons), order, birds
Nucleotide Protein
Gallus
genus, birds
Phasianinae
subfamily, birds
Pelecaniformes
(Ibis, herons and pelicans), order, birds
Sphenisciformes
(penguins), order, birds
Spheniscidae
(penguins), family, birds
Aptenodytes
Pygoscelis
Alcidae
family, birds
Fratercula
Ardea
(great herons), genus, birds
Phasianidae
(turkeys), family, birds
Gaviidae
(loons), family, birds
Procellariiformes
(petrels and albatrosses), order, birds
Procellariidae
(shearwaters and petrels), family, birds
Fulmarus
Scopidae
Scopus
Balaenicipitidae
Neoaves
clade, birds
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