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Swinhoe's storm petrel

Swinhoe's storm petrel
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Procellariiformes
Family: Hydrobatidae
Subfamily: Hydrobatinae
Genus: Oceanodroma
Species: O. monorhis
Binomial name
Oceanodroma monorhis
(Swinhoe, 1867)
Synonyms

Thalassidroma monorhis Swinhoe, 1867

Swinhoe's storm petrel (Oceanodroma monorhis), also known as Swinhoe's petrel, is a small, all-brown seabird of the storm petrel family Hydrobatidae.

It breeds on islands in the northwest Pacific off China, Japan and Korea. It nests in colonies close to the sea in rock crevices and lays a single white egg. It spends the rest of the year at sea, ranging into the Indian Ocean and Arabian Sea.

The common name commemorates the British naturalist Robert Swinhoe.[2]

Contents

  • Description 1
  • Habits and observation 2
  • Status 3
  • North Atlantic status 4
  • References 5
  • External links 6

Description

Swinhoe's storm petrel is a small bird, 18–21 cm in length with a 45–48 cm wingspan, though distinctly larger than the European storm petrel. It is essentially dark brown in all plumages, and has a fluttering flight, pattering on the water surface as it picks planktonic food items from the ocean surface. Unlike the European storm petrel, it does not follow ships.

In structure it most resembles a Leach's storm petrel with its forked tail, longish wings, and flight behaviour, but does not have a white rump and the call differs. It is difficult to distinguish from other all-dark Oceanodroma species, and the first English record had to be DNA-tested to eliminate the possibility that it was a Leach's storm petrel, since populations of north-eastern Pacific Leach's storm petrels contain individuals that show completely dark rumps.

Habits and observation

This storm petrel is strictly nocturnal at the breeding sites to avoid predation by gulls and skuas, and will even avoid coming to land on clear moonlit nights. Like most petrels, its walking ability is limited to a short shuffle to the burrow. It is strictly pelagic outside the breeding season, and this, together with its remote breeding sites, makes Swinhoe's petrel a difficult bird to see from land. Only in storms might this species be pushed into headlands, but even then an out of range bird would probably defy definite identification.

Status

Widespread throughout its large range, the Swinhoe's storm petrel was previously evaluated as least concern on the IUCN Red List of Threatened Species, but was uplisted to near threatened in 2012.[3]

North Atlantic status

On 8 July 1983, a bird was trapped on the Selvagens, Madeira and was confirmed to be the first record for the Atlantic Ocean.[4] Since then a number of storm petrels exhibiting plumage and structural characteristics have been recorded at sea, principally in the North Atlantic, while birds were trapped during the summer months in France (1989), England (1989 (two birds), 1990 (with birds retrapped from 1991 to 1994)), Spain (1994), Norway (1996, 1997), and again Madeira (1991, 1994).[5] Other than the east North Atlantic and the Mediterranean Sea a number of other individuals have been identified in the western North Atlantic. Records of single birds off Hatteras, North Carolina, on 20 August 1993, on 8 August 1998, and 2 June 2008 have all been accepted as valid North American records.

References

  1. ^  
  2. ^ Beolens, Bo; Watkins, Michael (2003). Whose Bird? Men and Women Commemorated in the Common Names of Birds. London: Christopher Helm. pp. 331–332. 
  3. ^ "Recently recategorised species". Birdlife International (2012). Retrieved 15 June 2012. 
  4. ^ James, P.C., & Robertson, H.A. 1985. First record of Swinhoe's Storm Petrel Oceanodroma monorhis in the Atlantic Ocean. Ardea 73: 105-106.
  5. ^ Morrison, S. 1998. All-dark petrels in the North Atlantic. British Birds 91: 540-560
  • American Ornithologists' Union (AOU) (2000): Forty-second supplement to the American Ornithologists' Union Check-list of North American Birds. The Auk 117(3): 847–858. doi:10.1642/0004-8038(2000)117[0847:FSSTTA]2.0.CO;2

External links

  • Species factsheet - BirdLife International
  • Birding Israel
  • Flicker Field Guide Birds of the World Photographs
  • Russian Nature Photographs
  • Video off Madeira Island
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