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The Procellariidae family are a group of seabirds in the bird order Procellariiformes, which also includes the Albatross family, Diomedeidae, the storm-petrels, Hydrobatidae, and the diving petrels, Pelacanoididae.

The family Procellariidae is the main radiation of medium-sized 'true petrels', characterised by united nostrils with medium septum, and a long outer functional primary. It is dominant in the Southern Oceans, but not so in the Northern Hemisphere.

It includes: