Pseudobulweria

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Pseudobulweria
Tahitipetrel1.jpg
Tahiti petrel (Pseudobulweria rostrata)
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Class: Aves
Order: Procellariiformes
Family: Procellariidae
Genus: Pseudobulweria
Mathews, 1936
Type species
Thalassidroma macgillivrayi (Fiji petrel)
Gray, 1860
Diversity
four extant species,
one extinct after 1500

Pseudobulweria is a genus of seabirds in the family Procellariidae. They have long been retained with the gadfly petrel genus Pterodroma despite morphological differences. Mitochondrial DNA cytochrome b sequence analysis has confirmed the split out of Pterodroma and places the genus closer to shearwaters. They thus represent either a plesiomorphic lineage still sharing some traits of the ancestral Procellariidae with the gadfly petrels, or convergent evolution of a shearwater to the ecological niche of gadfly petrels. [1]

Contents

They are a poorly known and highly endangered group: 3 of the 4 extant species are listed by the IUCN as critically endangered. The Tahiti petrel ( Pseudobulweria rostrata ) is the most familiar and the best studied.

Description and ecology

They are generally largish darkish petrels, but may have white undersides. They are long-winged and fly about with rather leisurely wingbeats and soar a lot. Though they are attracted by chum, Pseudobulweria petrels are not particularly prone to following ships. They often approach floating prey from downwind, picking it up without landing on the water or during a brief landing in which the wings are kept raised. [2] [3]

The breeding range of Pseudobulweria is limited essentially by the Equator and the Tropic of Capricorn, and possibly always has been. Non-breeding birds range more widely, but in general they are rarely met with in the Northern Hemisphere or outside tropical regions. Today, the genus inhabits only the Indo-Pacific region; formerly it was also found in the Atlantic. Three of the four extant Pseudobulweria species are listed as critically endangered. All three of these species are poorly known: the Fiji petrel (P. macgillivrayi), Beck's petrel (P. becki) and the Mascarene petrel (P. aterrima) are among the least well known seabird species on Earth, with the breeding colonies of all three species still a matter of speculation and awaiting confirmation. Both the former species have been seen very seldom since their discovery by science, although the Mascarene petrel is encountered on Réunion island as a result of light-induced fallout. Only the Tahiti petrel (P. rostrata) is more common across the Pacific Ocean, but it is still listed as near threatened. One species of Pseudobulweria has gone extinct in recent history; it has been described from subfossil remains found on Saint Helena. [2] [4]

Taxonomy

The genus Pseudobulweria was introduced in 1936 by the Australian born ornithologist Gregory Mathews with the Fiji petrel as the type species. Mathews suggested that petrels in his new genus Pseudobulweria had longer wings than those in Bulweria : "In Bulweria the wing measurement is less than twice the tail measurement; in Pseudobulweria the wing measurement is more than twice that of the tail." [5]

Species

The genus contains five species of which one is now extinct. [6]

ImageScientific nameCommon NameDistribution
Pseudobulweria macgillivrayi Fiji petrel Gau Island, Fiji
Tahitipetrel1.jpg Pseudobulweria rostrata Tahiti petrel American Samoa, Australia, Fiji, French Polynesia, Mexico, New Caledonia, New Zealand, the Solomon Islands, Tonga, Vanuatu, and possibly the Cook Islands.
Pseudobulweria becki Beck's petrel Melanesia
Petrel noir fabien Jan SEOR.jpg Pseudobulweria aterrima Mascarene petrel Réunion
Pseudobulweria rupinarum Saint Helena petrel Saint Helena (became extinct in the early 16th century)

Related Research Articles

<span class="mw-page-title-main">Procellariiformes</span> Order of birds

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.

<span class="mw-page-title-main">Shearwater</span> Seabird

Shearwaters are medium-sized long-winged seabirds in the petrel family Procellariidae. They have a global marine distribution, but are most common in temperate and cold waters, and are pelagic outside the breeding season.

<span class="mw-page-title-main">Petrel</span> Seabird

Petrels are tube-nosed seabirds in the bird order Procellariiformes.

<span class="mw-page-title-main">Procellariidae</span> Family of seabirds which includes petrels, shearweters and prions

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, which also includes the albatrosses and the storm petrels.

<span class="mw-page-title-main">Fea's petrel</span> Species of bird

The Fea's petrel is a small seabird in the gadfly petrel genus, Pterodroma. It was previously considered to be a subspecies of the soft-plumaged petrel, but they are actually not closely related at all. However, P. feae is very closely related to Zino's petrel and Desertas petrel, two other species recently split from P. mollis. The gadfly petrels are named for their speedy weaving flight, as if evading horseflies. The flight action is also reflected in the genus name Pterodroma, from Ancient Greek pteron, "wing" and dromos, " runner". This species is named after the Italian zoologist Leonardo Fea (1852-1903).

<span class="mw-page-title-main">Zino's petrel</span> Small seabird in the gadfly petrel genus

Zino's petrel or the freira, is a species of small seabird in the gadfly petrel genus, endemic to the island of Madeira. This long-winged petrel has a grey back and wings, with a dark "W" marking across the wings, and a grey upper tail. The undersides of the wings are blackish apart from a triangle of white at the front edge near the body, and the belly is white with grey flanks. It is very similar in appearance to the slightly larger Fea's petrel, and separating these two Macaronesian species at sea is very challenging. It was formerly considered to be a subspecies of the soft-plumaged petrel, P. mollis, but they are not closely related, and Zino's was raised to the status of a species because of differences in morphology, calls, breeding behaviour and mitochondrial DNA. It is Europe's most endangered seabird, with breeding areas restricted to a few ledges high in the central mountains of Madeira.

<span class="mw-page-title-main">Christmas shearwater</span> Species of bird

The Christmas shearwater or ʻaoʻū is a medium-sized shearwater of the tropical Central Pacific. It is a poorly known species due to its remote nesting habits, and it has not been extensively studied at sea either.

<i>Bulweria</i> Genus of birds

Bulweria is a genus of seabirds in the family Procellariidae named after English naturalist James Bulwer. The genus has two extant species, Bulwer's petrel and Jouanin's petrel. A third species, the Olson's petrel, became extinct in the early 16th century; it is known only from skeletal remains. Bulwer's petrel ranges in the Atlantic, Indian and Pacific Oceans, whereas Joaunin's petrel is confined to the northwestern Indian Ocean. Olson's petrel is known from the Atlantic.

<i>Procellaria</i> Genus of birds

Procellaria is a genus of Southern Ocean long-winged seabirds related to prions, and within the order Procellariiformes. The black petrel ranges in the Pacific Ocean, and as far north as Central America. The spectacled petrel is confined to the Atlantic Ocean, and the Westland petrel to the Pacific Ocean. The white-chinned and grey petrel range throughout the higher latitudes of the Southern Ocean.

<span class="mw-page-title-main">Bonin petrel</span> Species of bird

The Bonin petrel or nunulu is a seabird in the family Procellariidae. It is a small gadfly petrel that is found in the northwest Pacific Ocean. Its secretive habits, remote breeding colonies and limited range have resulted in few studies and many aspects of the species' biology are poorly known.

<span class="mw-page-title-main">Tahiti petrel</span> Species of bird

The Tahiti petrel is a medium-sized, dark brown and white seabird found across the Pacifc Ocean. The species comprises two subspecies: P. r. rostrata which breeds in the west-central Pacific Ocean, and P. r. trouessarti which breeds in the tropical and subtropical Pacific Ocean. The Tahiti petrel belongs to the Procellariidae family and is the most studied member of the Pseudobulweria genus which comprises three critically endangered species. Similarly, the Tahiti petrel is considered near threatened by the 2018 IUCN Red List of Threatened Species. Threats include introduced rats, feral cats, pigs, dogs, nickel mining, and light pollution.

<span class="mw-page-title-main">White-necked petrel</span> Species of bird

The white-necked petrel, also known as the white-naped petrel, is a species of seabird in the family Procellariidae. During the non-breeding season it occurs throughout a large part of the Pacific, but it is only known to breed on Macauley Island in New Zealand's Kermadec Islands and the Australian territory of Norfolk Island and Phillip Island. It formerly bred on Raoul Island, but has now been extirpated from this locality. Reports of breeding on Merelava, Vanuatu, are more likely to be the very similar Vanuatu petrel, P. occulta, which some consider to be a subspecies of the white-necked petrel. The IUCN rating as vulnerable is for the "combined" species.

The Vanuatu petrel or Falla's petrel is a species of gadfly petrel. This little-known seabird was first scientifically described in 2001 based on six specimens taken in 1927 off Merelava, Vanuatu, and a single bird found ashore in 1983 in New South Wales, Australia. The first confirmed breeding locality was only discovered in 2009 on the island of Vanua Lava, Vanuatu, but based on reports by locals it is supposed to also breed on Merelava. The IUCN has not recognized the Vanuatu petrel as a species, but maintain that it as a subspecies of the very similar white-necked petrel, P. cervicalis, with the "combined" species considered vulnerable.

The Desertas petrel is a small seabird in the gadfly petrel genus which breeds on Bugio Island in the Desertas off Madeira. The gadfly petrels in the genus Pterodroma are seabirds of temperate and tropical oceans. Many are little-known, and their often similar appearance have caused the taxonomy of the group to be rather fluid. Although the systematics on this species has not yet been definitively established, provisionally some authorities have split the Desertas petrel, separating the Desertas breeding birds from those in the Cape Verde archipelago, while others consider it a subspecies of the Fea's petrel. The species is named after its breeding grounds, which are pronounced "Dez-ERT-ass".

References

  1. Bretagnolle, Vincent; Attié, Carole & Pasquet, Eric (1998). "Cytochrome-B evidence for validity and phylogenetic relationships of Pseudobulweria and Bulweria (Procellariidae)" (PDF). Auk . 115 (1): 188–195. doi:10.2307/4089123. JSTOR   4089123.
  2. 1 2 Brooke, Michael (2004): Albatrosses and Petrels across the World. Oxford University Press, Oxford, New York. ISBN   0-19-850125-0
  3. Shirihai, Hadoram; Pym, Tony; Kretzschmar, Jörg; Moce, Kolinio; Taukei, Amania; Watling, Dick (2009). "First observations of Fiji Petrel Pseudobulweria macgillivrayi at sea: off Gau Island, Fiji, in May 2009" (PDF). Bulletin of the British Ornithologists' Club . 129 (3): 129–148.
  4. International Union for the Conservation of Nature and Natural Resources (IUCN) (2009): 2009 IUCN Red List of Threatened Species . IUCN, Gland.
  5. Mathews, Gregory M. (1936). "A note on the Black Fiji petrel". Ibis. 78 (2): 309. doi:10.1111/j.1474-919X.1936.tb03375.x.
  6. Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (July 2021). "Petrels, albatrosses". IOC World Bird List Version 11.2. International Ornithologists' Union. Retrieved 3 January 2022.