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Phoebastria
genus, birds
Nucleotide Protein
Thalassoica
Calonectris
Diomedeidae
family, birds
Pterodroma
Gavia
Fulmarus
Puffinus
Procellariidae
(shearwaters and petrels), family, birds
Procellariiformes
(petrels and albatrosses), order, birds
Gaviidae
(loons), family, birds
Gaviiformes
(loons), order, birds
Pygoscelis
Aptenodytes
Spheniscidae
(penguins), family, birds
Sphenisciformes
(penguins), order, birds
Neognathae
infraclass, birds
Thalassoica antarctica
species, birds
Pygoscelis antarcticus
(chinstrap penguin), species, birds
Pterodroma hypoleuca
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