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Procellariiformes / p r ɒ s ɛ ˈ l ɛər i. ɪ f ɔːr m iː z / is an order of seabirds that comprises four families : the albatrosses , the petrels and shearwaters , and two families of storm petrels .
Order: Procellariiformes Family: Procellariidae. The procellariids are the main group of medium-sized "true petrels", characterized by united nostrils with medium nasal septum, and a long outer functional primary flight feather. Southern giant petrel, Macronectes giganteus LC; Northern giant petrel, Macronectes halli LC
This is a list of Procellariiformes species by global population. While numbers are estimates, they have been made by the experts in their fields. For more information on how these estimates were ascertained, see Wikipedia's articles on population biology and population ecology.
The family Procellariidae is a group of seabirds that comprises the fulmarine petrels, the gadfly petrels, the diving petrels, the prions, and the shearwaters.This family is part of the bird order Procellariiformes (or tubenoses), which also includes the albatrosses and the storm petrels.
Procellariiformes (from the Latin procella, a storm) is an order of birds formerly called Tubinares and still called tubenoses in English. They are all highly pelagic seabirds , and all of them have their nostrils enclosed in one or two tubes on their straight, deeply grooved bills with hooked tips.
Based on Austin (1996), Bretagnolle et al. (1998), Nunn & Stanley (1998) and Brooke (2004), several changes have been made from the more traditional taxonomy. The two species in the genus Bulweria are no longer considered close to the rest of the gadfly petrels; several more gadfly petrels are removed from Pterodroma and placed in Pseudobulweria (allied to the shearwaters), and the Kerguelen ...
As members of Procellaridae and then the order Procellariiformes, they share certain traits. First, they have nasal passages that attach to the upper bill called naricorns. The bills of Procellariiformes are unique in being split into between seven and nine horny plates.
The bills of Procellariiformes are also unique in that they are split into between seven and nine horny plates. The petrels have a hooked bill called the maxillary unguis which can hold slippery prey. They produce a stomach oil made up of wax esters and triglycerides which is stored in the proventriculus.