Procellariiformes is an order of seabirds that comprises four families: the albatrosses, petrels and shearwaters, storm petrels, and diving petrels. Formerly called Tubinares and still called tubenoses in English, they are often referred to collectively as the petrels, a term that has been applied to all Procellariiformes, or more commonly all the... Found on http://en.wikipedia.org/wiki/Procellariiformes
The Procellariiformes are an order of birds. These are the tube-nosed swimmers. They are sea birds of about 100 species. They have a horn sheathed bill, tubular nostrils and webbed feet. Found on http://www.probertencyclopaedia.com/browse/BPA.HTM