Whenua Hou diving petrel | |
---|---|
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Aves |
Order: | Procellariiformes |
Family: | Procellariidae |
Genus: | Pelecanoides |
Species: | |
Subspecies: | P. g. whenuahouensis |
Trinomial name | |
Pelecanoides georgicus whenuahouensis Fischer et al., 2018 |
The Whenua Hou diving petrel (Pelecanoides georgicus whenuahouensis) known also as Kuaka, is a highly endangered subspecies of the South Georgia diving petrel that is endemic to New Zealand. [2] [3]
The subspecies was first described by Johannes H. Fischer and collaborators in 2018. While formerly considered a unique population of the South Georgia diving petrel, differences in habitat preference and analyses of phenotypic differentiations indicates that it could be considered as a distinct species. [4] Only one extremely small population (less than 150 individuals) currently exists, breeding on the predator-free Whenua Hou island. There, it displays the unique nesting practice of burrowing into the sand dunes overlooking Sealers Bay, unlike the South Georgia diving petrel which nests on rocky slopes or flat land. [5]
Based on subfossil remains, this subspecies formerly nested on Auckland Island and Stewart Island, and possibly on the Chatham and Macquarie islands as well. It was extirpated from Auckland due to nest destruction by New Zealand sea lions, [6] while on Stewart it was extirpated due to nest predation by the introduced Polynesian rat. [7] The remaining population itself is highly threatened by storm events; one such event in 2003 led to the collapse of many dunes, killing many birds. They are also threatened by the advance of coastal forest and invasive grasses and herbs over the dunes, [5] as well as sea level rise due to climate change. [8] While the petrel's foraging areas are unknown, an oil spill over this area would be devastating for this subspecies. [5]
Procellariiformes is an order of seabirds that comprises four families: the albatrosses, the petrels and shearwaters, and two 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.
The diving petrels form a genus, Pelecanoides, of seabirds in the family Procellariidae. There are four very similar species of diving petrels, distinguished only by small differences in the coloration of their plumage, habitat, and bill construction. They are only found in the southern hemisphere. The diving petrels were formerly placed in their own family, the Pelecanoididae.
Wilson's storm petrel, also known as Wilson's petrel, is a small seabird of the austral storm petrel family Oceanitidae. It is one of the most abundant bird species in the world and has a circumpolar distribution mainly in the seas of the southern hemisphere but extending northwards during the summer of the northern hemisphere. The world population was estimated in 2022 as stable at 8 to 20 million birds. In 2010 it had been estimated at 12-30 million. A 1998 book had estimated more than 50 million pairs. The name commemorates the Scottish-American ornithologist Alexander Wilson. The genus name Oceanites refers to the mythical Oceanids, the three thousand daughters of Tethys. The species name is from Latin oceanus, "ocean".
The yellow-eyed penguin, known also as hoiho, is a species of penguin endemic to New Zealand. It is the sole extant species in the genus Megadyptes.
The Magellanic diving-petrel is a species of diving petrel, one of five very similar, small, auk-like petrels found exclusively in the southern oceans. It is one of the smaller species of diving-petrels, though size differences are seemingly indistinguishable between species unless seen up close. It is probably the least known of all five species.
Codfish Island / Whenua Hou is a small island located to the west of Stewart Island in southern New Zealand. It reaches a height of 250 m (820 ft) close to the south coast. The island is home to Sirocco, an internationally famous kākāpō, a rare species of parrot.
The Peruvian diving petrel is a small seabird that feeds in offshore waters in the Humboldt Current off Peru and Chile.
The New Zealand fernbird or simply fernbird is an insectivorous bird endemic to New Zealand. In the Māori language, it is named kōtātā or mātātā.
The snow petrel is the only member of the genus Pagodroma. It is one of only three birds that have been seen at the Geographic South Pole, along with the Antarctic petrel and the south polar skua, which has the most southerly breeding sites of any bird, inland in Antarctica.
The common diving petrel , also known as the smaller diving petrel or simply the diving petrel, is a diving petrel, one of four very similar auk-like small petrels of the southern oceans. It is native to South Atlantic islands and islands of the subantarctic southern Indian Ocean, islands and islets off New Zealand and south-eastern Australian islands.
The white-chinned petrel also known as the Cape hen and shoemaker, is a large shearwater in the family Procellariidae. It ranges around the Southern Ocean as far north as southern Australia, Peru and Namibia, and breeds colonially on scattered islands. The white-chinned petrel was formerly considered to be conspecific with the spectacled petrel.
The mottled petrel or kōrure is a species of seabird and a member of the gadfly petrels. It usually attains 33 to 35 cm (13–14 in) in length with a 74 to 82 cm (29–32 in) wingspan.
The South Georgia diving petrel or Georgian diving-petrel is one of five very similar small auk-like diving petrels of the southern oceans. It is native to the South Atlantic and islands of the southern Indian Ocean and south-eastern Australia.
The Southern Indian Ocean Islands tundra is a tundra ecoregion that includes several subantarctic islands in the southern Indian Ocean.
Diver Point is a point midway along the north shore of Bird Island, South Georgia. The name, by the UK Antarctic Place-Names Committee, derives from the South Georgia diving petrel which nests nearby.
Pelecanoides miokuaka is an extinct species of diving petrel of New Zealand. Described in 2007, it is known only from a single humerus bone that was discovered from early Miocene sediments of the Manuherikia Group.
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