Procellariiformes

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Procellariiformes
Temporal range: Eocene - Present
Cape Petrel Daption capense
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Infraclass: Neognathae
Superorder: Neoaves
Order: Procellariiformes
Fürbringer, 1888
Families

Procellariidae
Diomedeidae
Hydrobatidae
Pelecanoididae

Procellariiformes is an order of seabirds that comprises four families: the albatrosses, petrels and shearwaters, storm petrels, and diving petrels. They have a cosmopolitan distribution across the world's oceans, with the highest diversity being around New Zealand. Only a single egg is laid per nesting attempt, and usually only a single nesting attempt is made per year, although the larger albatrosses may only nest once every two years. Both parents participate in incubation and chick rearing. Incubation times are long compared to other birds, as are fledgling periods. Once a chick has fledged there is no further parental care.