They actively take the eggs of smaller seabirds such as those of White Tern (Gygis alba) and the endemic Laysan Duck (Anas laysanensis).
Additionally, the Little White Tern (G. microrhyncha) was long and often is still included herein as a subspecies G.
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18 species of seabird, the Black-footed Albatross, Laysan Albatross, Bonin Petrel, Bulwer's Petrel, Wedge-tailed Shearwater, Christmas Shearwater, Tristram's Storm-petrel, Red-tailed Tropicbird, Masked Booby, Red-footed Booby, Brown Booby, Great Frigatebird, Spectacled Tern, Sooty Tern, Blue-gray Noddy, Brown Noddy, Black Noddy and White Tern nest on the islands, most of them (16) on Tern Island.
Noteworthy fauna includes several species of seabirds, including the Red-footed Booby (Sula sula), Great Frigatebird (Fregata minor), Lesser Frigatebird (F. ariel), Black Noddy (Anous minutus), White Tern (Gygis alba), Masked Booby (Sula dactylatra), Brown Booby (S. leucogaster) and Brown Noddy (Anous stolidus).