Shorebirds of the Yellow Sea

Importance, threats and conservation status
Mark Barter
Wetlands International, 2002
ISBN 90 5882 009 2

4. Shorebirds occuring in internationally important numbers at Yellow Sea sites (continued)

4.4 Species accounts (continued)

4.4.26 Eurasian Oystercatcher Haematopus ostralegus

Subspecies Worldwide 4 (ostralegus, longipes, osculans and finschi); Yellow Sea 1 (osculans).

Distribution of H. o. osculans

Breeding: ne. China, w. North and South Korea, n. Sea of Okhotsk and Kamchatka.

Non-breeding: Coastal. Japan, South Korea, and e. and s. China.

Usage and importance of Yellow Sea

Occurrence: Intertidal flats. Interpretation of count data is complicated by lack of knowledge about breeding numbers in Yellow Sea. B Suspected that 300-700 pairs breed in South Korea, although only 15 pairs proven (Yi & Kim in prep.). 100 pairs at Shuangtaizihekou NNR (Y.X. Li in litt.); about 50 pairs in Yancheng NNR (H. Wang pers. comm.). NM and SM Widespread, normally in small numbers but with some important concentrations. NB More common in South Korea, with >50% of the estimated flyway population occurring at the Geum Gang Hagu. Counts probably reasonably complete in areas surveyed during NM and SM. However, surveys during the breeding season could identify additional important concentrations.

Movements: No information.

Significance of Yellow Sea: The Yellow Sea is extremely important for this species, as part of the flyway population breeds there and most of the population spends the NB season in the region. There is insufficient information to enable estimates to be made of numbers in China.

Key sites: 7 sites of international importance have been identified, 2 in South Korea and 5 in China; 3 of the sites are important during NM, 4 during SM and 2 during the NB season (see site location maps below). Breeds in internationally important numbers at Yancheng NNR and Shuangtaizihekou NNR (for site locations see map below). Shuangtaizihekou NNR is important during both NM and SM, supporting 5% of the flyway population on SM. Geum Gang Hagu holds more than 50% of the estimated flyway population during the NB season.

Status of key sites: 4 of the Chinese sites are in Protected Areas.

Major gaps in knowledge: Inadequate information on breeding distribution and abundance in Yellow Sea. Incomplete geographical and temporal coverage in China and South Korea. No information from North Korea.

EAAF POPULATION ESTIMATE: 10 000
YELLOW SEA
Status: Probably resident breeder, passage migrant and non-breeding visitor
Estimated minimum numbers:

NM: South Korea: 550.
SM: South Korea: 550.
NB: South Korea: 6 000.
INTERNATIONALLY IMPORTANT SITES (and Protected Area status)
South Korea: 2 (0)
China: 5 (4)

Site count references

  1. Barter et al. 2000c
  2. Wang et al. 1992
  3. Brazil 1992
  4. Yi & Kim in prep.
  5. Y.X. Li in litt.
  6. Wang & Barter 1998
  7. N. Moores in litt.
  8. Wang 1997
Sites of international importance for Eurasian Oystercatcher
Sites of international importance for Eurasian Oystercatcher
  China   South Korea
1 Dong Sha 6 Namyang Man
2 Yancheng NNR 7 Geum Gang Hagu
3 Huang He NNR    
4 Shuangtaizihekou NNR    
5 Yalu Jiang NNR    
       
Sites of international importance for Eurasian Oystercatcher during northward migration
Sites of international importance for Eurasian Oystercatcher during northward migration
  Site Country Count Ref
1 Yalu Jiang NNR China 189 1
2 Huang He NNR China 130 2
3 Shuangtaizihekou NNR China 100 3
         
         
         
Sites of international importance for Eurasian Oystercatcher during southward migration
Sites of international importance for Eurasian Oystercatcher during southward migration
  Site Country Count Ref
1 Geum Gang Hagu South Korea 1 060 4
2 Shuangtaizihekou NNR China 500 5
3 Namyang Man South Korea 220 4
4 Dong Sha China 120 6
         
         
Sites of international importance for Eurasian Oystercatcher during the non-breeding season
Sites of international importance for Eurasian Oystercatcher during the non-breeding season
  Site Country Count Ref
1 Geum Gang Hagu South Korea 5 700 7
2 Yancheng NNR China 200 8