page_title: Procellariiformes
section_title: Pair bonds and life history
hierarchical_section_title: Procellariiformes / Biology / Breeding behaviour / Pair bonds and life history
caption_attribution_description: English: Wandering albatross. Diomedea exulans, on the West coast (presqu'île Railler du Baty) of the Grand Terre, main island of Kerguelen archipelago. Français&#160;: Albatros hurleur. Diomedea exulans. Sur la côte Ouest de Kerguelen (Railler du Baty).
context_page_description: Procellariiformes is an order of seabirds that comprises four families: the albatrosses, petrels and shearwaters, and 2 families of storm petrels. Formerly called Tubinares and still called tubenoses in English, procellariiforms are often referred to collectively as the petrels, a term that has been applied to all members of the order, or more commonly all the families except the albatrosses. They are almost exclusively pelagic, and have a cosmopolitan distribution across the world's oceans, with the highest diversity being around New Zealand.
  Procellariiforms are colonial, mostly nesting on remote, predator-free islands. The larger species nest on the surface, while most smaller species nest in natural cavities and burrows. They exhibit strong philopatry, returning to their natal colony to breed and returning to the same nesting site over many years. Procellariiforms are monogamous and form long-term pair bonds that are formed over several years and may last for the life of the pair. A single egg is laid per nesting attempt, and usually a single nesting attempt is made per year, although the larger albatrosses may only nest once every two years.
context_section_description: Procellariiforms are monogamous breeders and form long-term pair bonds. These pair bonds take several years to develop in some species, particularly with the albatrosses. Once formed, they last for many breeding seasons, in some cases for the life of the pair. Petrel courtship can be elaborate. It reaches its extreme with the albatrosses, where pairs spend many years perfecting and elaborating mating dances. These dances are composed of synchronised performances of various actions such as preening, pointing, calling, bill clacking, staring, and combinations of such behaviours (like the sky-call). Each particular pair will develop their own individual version of the dance. The breeding behaviour of other procellariiforms is less elaborate, although similar bonding behaviours are involved, particularly for surface-nesting species. These can involve synchronised flights, mutual preening and calling. Calls are important for helping birds locate potential mates and distinguishing between species, and may also help individuals assess the quality of potential mates. After pairs have been formed, calls serve to help them reunite; the ability of individuals to recognise their own mate has been demonstrated in several species.
  Procellariiforms are K-selected, being long-lived and caring extensively for their few offspring. Breeding is delayed for several years after fledging, sometimes for as long as ten years in the largest species. Once they begin breeding, they make only a single breeding attempt per nesting season; even if the egg is lost early in the season, they seldom re-lay. Much effort is placed into laying a single (proportionally) large egg and raising a single chick. Procellariiforms are long-lived: the longest living albatross known survived for 51 years, but was probably older, and even the tiny storm-petrels are known to have survived for 30 years.
caption: Wandering albatrosses performing their mating dances on the Kerguelen Islands
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