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Sep 11 2011

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Swinhoes Storm-petrel (Oceanodroma monorhis)

Swinhoes Storm-petrel

[order] PROCELLARIIFORMES | [family] Hydrobatidae | [latin] Oceanodroma monorhis | [authority] Swinhoe, 1867 | [UK] Swinhoes Storm-petrel | [FR] Oceanite de Swinhoe | [DE] Swinhoe-Wellenlaufer | [ES] Paino de Swinhoe | [NL] Chinees Stormvogeltje

Subspecies

Genus Species subspecies Region Range
Oceanodroma monorhis IO, PO n IO, w PO

Genus

Storm-petrels are rather small and often dark colored tubenoses with a world wide distribution. All have fine black bills with very pronounced tubes. Storm Petrels are separated in two groups: the long legged, Southern Hemisphere birds subfamily Oceanitinae and the shorter legged species of more northern seas the subfamily Hydrobatinae. The first groups shows more morphological differences than the second. The genera are characterised on colour patterns, the condition of the nasal tubes, tail shape, structure of claws and proportions of the leg bones. The genus Oceanodroma consists of medium-sized petrels; plumage dark or greyish, often with pale rumps; tail more or less forked; tarsus short , middle toe with claw and scutellate; claws narrow.

Physical charateristics

Swinhoe’s Storm-Petrel (Oceanodromma onorhis)is a nocturnal seabird related closely to Leach’s Storm-Petrel. It has a uniformly dark underwing, a forked tail and distinct pale bases to the primary shafts shallow fork to tail. It is of different size than other all-dark species.


wingspan min.: 45 cm wingspan max.: 48 cm
size min.: 19 cm size max.: 22 cm
incubation min.: 0 days incubation max.: 0 days
fledging min.: 0 days fledging max.: 0 days
broods: 1   eggs min.: 1  
      eggs max.: 1  

Range

Indian Ocean, West Pacific Ocean. The species breeds on Verkhovsky Island, south of Vladivostok, Russia, and Japan. There are little known populations in China, North Korea and South Korea, and records suggest breeding may possibly occur in the North Atlantic.

Habitat

Marine and pelagic; but also occurs in coastal waters.
Breeds on small offshore islands

Reproduction

Swinhoe’s Storm Petrel breeds in the northwestern Pacific Ocean on islands off eastern
Russia, Korea, Japan, China and Taiwan, with egg-laying between May and August Forms loose colonies. Nest in burrows. 1 egg.

Feeding habits

No information available on diet. Feeds mainly on wing by dipping, does not patter

Video Swinhoes Storm-petrel

httpv://www.youtube.com/watch?v=-sN95n1OedQ

copyright: Martin Kennewell


Conservation

This species has a very large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population trend appears to be stable, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size is very large, and hence does not approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.
Oceanodroma monorhis breeds on Verkhovsky Island (7,500 pairs), south of Vladivostok, Russia, and Japan (a minimum of 1,000 pairs). There are little known populations in China, North Korea and South Korea, and records suggest breeding may possibly occur in the North Atlantic.
Swinhoes Storm-petrel status Least Concern

Migration

It migrates southwards to the west tropical Pacific and the Sunda Sea, and is frequently
found in the vicinity of Singapore. Some regularly pass through the Straits of Malacca westward into the Indian Ocean and Arabian Sea. In the Indian Ocean, Swinhoe’s Storm Petrels have been recorded widely induding some to more than 100S – to the north-east of Madagascar and may possibly reach 200S. A beach-washed specimen at Eilat in the Gulf of
Aqaba at the head of the Red Sea in January 1958 was the only previous western Palearctic
record

Distribution map

Swinhoes Storm-petrel distribution range map

Literature

Title Vocal Behavior of Swinhoe’s Storm-Petrel (Oceanodroma rnonorhis)
Author(s): MIKI TAOKA et al
Abstract: Swinhoe’s Storm-Petrel (Oceanodromma onorhis)is a ..[more]..
Source: Auk, Vol. 106

download full text (pdf)

Title NORTH ATLANTIC POSSIBLE, PROBABLE AND REJECTED RECORDS OF
SWINHOE?S STORM-PETREL AND EXTRALIMITAL BULWER?S PETREL
Author(s): Bob Flood
Abstract: Records of Swinhoe?s Storm-petrel and extralimital..[more]..
Source: Scilly pelagics

download full text (pdf)

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