Procellariiformes

Procellariidae - The family Procellariidae is a group of seabirds that comprises the fulmarine petrels, the gadfly petrels, the prions, and the shearwaters.

Diomedeidae - Albatrosses, of the biological family Diomedeidae, are large seabirds allied to the procellariids, storm-petrels and diving-petrels in the order Procellariiformes .

Hydrobatidae - Storm-petrels have a cosmopolitan distribution, being found in all oceans.

Pelecanoididae - The diving-petrels are seabirds in the bird order Procellariiformes.

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