White-tailed tropicbird

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White-tailed tropicbird
Phaethon lepturus (Warwick, Bermuda) (cropped).jpg
Warwick Parish, Bermuda
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Phaethontiformes
Family: Phaethontidae
Genus: Phaethon
Species:
P. lepturus
Binomial name
Phaethon lepturus
Daudin, 1802
Phaethon lepturus map.svg

The white-tailed tropicbird (Phaethon lepturus) is a tropicbird. It is the smallest of three closely related seabirds of the tropical oceans and smallest member of the order Phaethontiformes. It is found in the tropical Atlantic, western Pacific and Indian Oceans. It also breeds on some Caribbean islands, and a few pairs have started nesting recently on Little Tobago, joining the red-billed tropicbird colony. In addition to the tropical Atlantic, it nests as far north as Bermuda, where it is locally called a "longtail". [2]

Contents

Taxonomy

Flying at Midway Atoll Phaethon lepturus -Midway Atoll, USA -flying-8.jpg
Flying at Midway Atoll

French zoologist François Marie Daudin described the white-tailed tropicbird in 1802. [3] [4]

"White-tailed tropicbird" has been designated the official name by the International Ornithologists' Union (IOC). [5]

Its closest relative is the red-tailed tropicbird (P. rubricauda), the split between their ancestors taking place about four million years ago. [6]

Six subspecies are recognised by the IOC: [5]

Description

The adult white-tailed tropicbird is a slender, mainly white bird, 71–80 cm long including the very long central tail feathers, which double its total length. The wingspan is 89–96 cm. The bird has a black band on the inner wing, a black eye-mask, and an orange-yellow to orange-red bill. [8] The bill colour, pure white back and black wing bar distinguish this species from the red-billed tropicbird.

The white-tailed tropicbird breeds on tropical islands, laying a single egg directly onto the ground or a cliff ledge. It disperses widely across the oceans when not breeding, and sometimes wanders far. It feeds on fish and squid, caught by surface plunging, but this species is a poor swimmer. The call is a high screamed keee-keee-krrrt-krrt-krrt. Sexes are similar, although males on average are longer tailed, but juveniles lack the tail streamers, have a green-yellow bill, and a finely barred back. The white-tailed tropicbird does not have a yearly breeding cycle; instead, breeding frequency depends on the climate and availability of suitable breeding sites. The bird can reproduce 10 months after the last successful breeding, or 5 months after an unsuccessful one.

Behavior

A pair in flight White-tailed Tropicbird.jpg
A pair in flight
In the Seychelles Tropicbird Seychelles.jpg
In the Seychelles

The white-tailed tropicbird feeds mainly on flying fish, squid and crabs. [9] It catches its prey by diving from height of up to 20 meters, as do gannets. However, flying fish are caught in flight. It usually feeds in pairs. Prey is often detected by hovering above the surface as the bird swallows it before taking off. [10]

Phaethon lepturus egg, MHNT Phaethon lepturus MHNT.ZOO.2010.11.2.12.jpg
Phaethon lepturus egg, MHNT

Conservation status

Population trends are unknown. In Mexico it is not under any category of protection, and no specific conservation programs for these tropicbirds are known. However, the species is found in various conservation programs as an American waterfowl. It is recommended to conduct studies on the biology of this species at sea, as well as monitoring of breeding colonies. Globally it is considered a species of Least Concern. [11]

Folklore

The ancient Chamorro people called the white-tailed tropicbird utak or itak, and believed that when it screamed over a house it meant that someone would soon die or that an unmarried girl was pregnant. Its call would kill anyone who didn't believe in it. Chamorro fishermen would find schools of fish by watching them. [12]

Related Research Articles

<span class="mw-page-title-main">Europa Island</span> French atoll in the Mozambique Channel

Europa Island, in Malagasy Nosy Ampela is a 28-square-kilometre (11 sq mi) low-lying tropical atoll in the Mozambique Channel, about a third of the way from southern Madagascar to southern Mozambique. The island had never been inhabited until 1820, when the French family of Rosier moved to it. The island officially became a possession of France in 1897, though it is claimed by Madagascar.

<span class="mw-page-title-main">Frigatebird</span> Family of seabirds (Fregatidae)

Frigatebirds are a family of seabirds called Fregatidae which are found across all tropical and subtropical oceans. The five extant species are classified in a single genus, Fregata. All have predominantly black plumage, long, deeply forked tails and long hooked bills. Females have white underbellies and males have a distinctive red gular pouch, which they inflate during the breeding season to attract females. Their wings are long and pointed and can span up to 2.3 metres (7.5 ft), the largest wing area to body weight ratio of any bird.

<span class="mw-page-title-main">Tropicbird</span> Family of birds

Tropicbirds are a family, Phaethontidae, of tropical pelagic seabirds. They are the sole living representatives of the order Phaethontiformes. For many years they were considered part of the Pelecaniformes, but genetics indicates they are most closely related to the Eurypygiformes. There are three species in one genus, Phaethon. The scientific names are derived from Ancient Greek phaethon, "sun". They have predominantly white plumage with elongated tail feathers and small feeble legs and feet.

<span class="mw-page-title-main">Red-billed tropicbird</span> Species of seabird of tropical oceans

The red-billed tropicbird is a tropicbird, one of three closely related species of seabird of tropical oceans. Superficially resembling a tern in appearance, it has mostly white plumage with some black markings on the wings and back, a black mask and, as its common name suggests, a red bill. Most adults have tail streamers that are about two times their body length, with those in males being generally longer than those in females. The red-billed tropicbird itself has three subspecies recognized, including the nominate. The subspecies mesonauta is distinguished from the nominate by the rosy tinge of its fresh plumage, and the subspecies indicus can be differentiated by its smaller size, more restricted mask, and more orange bill. This species ranges across the tropical Atlantic, eastern Pacific, and Indian Oceans. The nominate is found in the southern Atlantic Ocean, the subspecies indicus in the waters off of the Middle East and in the Indian Ocean, and the subspecies mesonauta in the eastern portions of both the Atlantic and the Pacific Oceans and in the Caribbean. It was one of the many species described by Carl Linnaeus in his 1758 10th edition of Systema Naturae.

François Marie Daudin was a French zoologist.

<span class="mw-page-title-main">Brown booby</span> Species of bird

The brown booby is a large seabird of the booby family Sulidae, of which it is perhaps the most common and widespread species. It has a pantropical range, which overlaps with that of other booby species. The gregarious brown booby commutes and forages at low height over inshore waters. Flocks plunge-dive to take small fish, especially when these are driven near the surface by their predators. They nest only on the ground, and roost on solid objects rather than the water surface.

<span class="mw-page-title-main">Red-tailed tropicbird</span> Seabird of the tropical Indian and Pacific Oceans

The red-tailed tropicbird is a seabird native to tropical parts of the Indian and Pacific Oceans. One of three closely related species of tropicbird (Phaethontidae), it was described by Pieter Boddaert in 1783. Superficially resembling a tern in appearance, it has almost all-white plumage with a black mask and a red bill. The sexes have similar plumage. As referenced in the common name, adults have red tail streamers that are about twice their body length. Four subspecies are recognised, but there is evidence of clinal variation in body size—with smaller birds in the north and larger in the south—and hence no grounds for subspecies.

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

Audubon's shearwater is a common tropical seabird in the petrel family. Sometimes known as the dusky-backed shearwater, the specific epithet honours the French naturalist Félix Louis L'Herminier.

<span class="mw-page-title-main">Little Tobago</span> Island off the northeast coast of Tobago

Little Tobago is a small island off the northeastern coast of Tobago, and part of the Republic of Trinidad and Tobago.

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

The Bermuda petrel is a gadfly petrel. Commonly known in Bermuda as the cahow, a name derived from its eerie cries, this nocturnal ground-nesting seabird is the national bird of Bermuda and can be found pictured on Bermudian currency. The Bermuda petrel is the second rarest seabird on the planet. They have medium-sized body and long wings, a greyish-black crown and collar, dark grey upper-wings and tail, white upper-tail coverts and white under-wings edged with black, and the underparts are completely white.

<span class="mw-page-title-main">Kilauea Point National Wildlife Refuge</span> Seabird nesting site on Kauaʻi Island, Hawaiʻi, U.S.

Kīlauea Point National Wildlife Refuge is a National Wildlife Refuge on the northwest coast of the island of Kauaʻi in Hawaiʻi.

<span class="mw-page-title-main">Fauna of the Cocos (Keeling) Islands</span>

The terrestrial fauna of the Cocos (Keeling) Islands is unsurprisingly depauperate, because of the small land area of the islands, their lack of diverse habitats, and their isolation from large land-masses. However, the fauna dependent on marine resources is much richer.

<span class="mw-page-title-main">Fork-tailed flycatcher</span> Species of bird

The fork-tailed flycatcher is a passerine bird of the tyrant flycatcher family and is a member of a genus typically referred to as kingbirds. Named for their distinguishably long, forked tail, fork-tailed flycatchers are seen in lightly forested or grassland areas, from southern Mexico to south past Argentina. They are most frequently observed sitting on conspicuous perches waiting for flying arthropods to fly past, they then sally out, eat their prey, and return to their perches. Northern populations near southern Mexico tend to be permanent residents, while fork-tailed flycatchers that live further south are migrants with a reputation for wandering to as far north as New Brunswick, Canada.

References

  1. BirdLife International (2020). "Phaethon lepturus". IUCN Red List of Threatened Species . 2020: e.T22696645A163887639. doi: 10.2305/IUCN.UK.2020-3.RLTS.T22696645A163887639.en . Retrieved 27 March 2022.
  2. Longtail. The Bermuda Audubon Society.
  3. Lacépède, Bernard Germain de; Daudin, François Marie (1799). "Tableau des sous-classes, divisions, sous-divisions, ordres et genres des oiseaux, par le Cen Lacépède; avec l'indication de toutes les espèces décrites par Buffon, et leur distribution dans chacun des genres, par F. M. Daudin". In Buffon, Georges-Louis Leclerc de (ed.). Histoire Naturelle par Buffon Dédiée au citoyen Lacépède, membre de l'Institut National (in French). Vol. 14: Quadrupedes. Paris: P. Didot l'ainé et Firmin Didot. pp. 197-346 [319]. Although the date of 1799 is printed on the title page, this volume was not published until 1802. For a discussion of the date see: Richmond, Charles W. (1899). "On the date of Lacépède's 'Tableaux'". Auk. 16: 325–329.
  4. Mayr, Ernst; Cottrell, G. William, eds. (1979). Check-List of Birds of the World. Vol. 1 (2nd ed.). Cambridge, Massachusetts: Museum of Comparative Zoology. p. 158.
  5. 1 2 3 4 5 6 7 Gill, Frank; Donsker, David, eds. (2023). "Kagu, Sunbittern, tropicbirds, loons, penguins". World Bird List Version 13.2. International Ornithologists' Union. Retrieved 27 November 2023.
  6. Kennedy, Martyn; Spencer, Hamish G (2004). "Phylogenies of the frigatebirds (Fregatidae) and tropicbirds (Phaethonidae), two divergent groups of the traditional order Pelecaniformes, inferred from mitochondrial DNA sequences". Molecular Phylogenetics and Evolution. 31 (1): 31–38. doi:10.1016/j.ympev.2003.07.007. PMID   15019606.
  7. Corre, Matthieu Le; Cebc, Pierre Jouventin (1999). "Geographical variation in the White‐tailed Tropicbird Phaethon lepturus, with the description of a new subspecies endemic to Europa Island, southern Mozambique Channel". Ibis. 141 (2): 233–239. doi:10.1111/j.1474-919X.1999.tb07546.x.
  8. Redman, Nigel; Stevenson, Terry; Fanshawe, John (2016). Birds of the Horn of Africa: Ethiopia, Eritrea, Djibouti, Somalia, and Socotra - Revised and Expanded Edition. Princeton Field Guides. Princeton, New Jersey: Princeton University Press. p. 42. ISBN   978-0-691-17289-7. OCLC   944380248 . Retrieved 2018-11-27.
  9. "White-tailed Tropicbird | Audubon Field Guide". Audubon. Retrieved 2024-04-21.
  10. "White-tailed Tropicbird". www.oiseaux-birds.com.
  11. "White-tailed Tropicbird – Conservation – Neotropical Birds Online". neotropical.birds.cornell.edu. 22 November 2023.
  12. Cunningham, Lawrence J. (1992). Ancient Chamorro Society. Bess Press. p. 112. ISBN   9781880188057.

Further reading