Population information

Order name Charadriiformes
Family name Laridae
Scientific name Larus crassirostris Common name Black-tailed Gull
Population name E Asia
Breeding range Coasts SE Russia, Japan, Korea, E China Non-breeding range E Asia Pacific coast N Japan to NE China Sea
Red List Category Least Concern
Ramsar regions Asia
Notes

Conservation Framework

Conservation framework Notes
EAAF Partnership
Note:

Population size

Publication Start year End year Minimum Maximum Estimate quality Notes References Actions
WPE 1 0 0 160,000 160,000 No quality assessment [R165]
WPE 2 0 0 160,000 160,000 No quality assessment [R165]
WPE 3 0 0 160,000 160,000 No quality assessment [R165]
WPE 4 0 0 1,050,000 1,050,000 No quality assessment [S2097] [R428]
WPE 5 0 0 1,050,000 1,050,000 No quality assessment [S7187] [R428]

Population trends

Publication Start year End year Trend Trend quality Notes References Actions
WPE 1 1977 1991 STA No quality assessment [R519]
WPE 2 1977 1991 STA No quality assessment [R519]
WPE 3 1977 1991 STA No quality assessment [R519]
WPE 4 1977 1991 STA No quality assessment [R519]
WPE 5 1977 1991 STA No quality assessment [R519]

Population 1% level

Publication Yearset 1 percent Note
WPE 1 1994 1600
WPE 2 1994 1600
WPE 3 1994 1600
WPE 4 2006 10500
WPE 5 2006 10500

References

  • R165 - Croxall, J.P., Evans, P.G.H. and Schreiber, R.W. (eds.). 1984. Status and Conservation of the World's Seabirds. ICBP Technical Publication No. 2. Cambridge, UK.
  • R519 - Perennou, C.P., Mundkur, T. and Scott, D.A. 1994. The Asian Waterfowl Census 1987-1991: distribution and status of Asian waterfowl. IWRB Spec. Publ. No. 24; AWB Spec. Publ. No. 86. Slimbridge, UK and Kuala Lumpur, Malaysia.
  • R428 - Malling Olsen, K. and Larsson, H. 2002. Gulls of Europe, Asia and North America. Helm and Princeton University Press.
  • R1836 - Croxall JP, Butchart SHM, Lascelles B, Stattersfield AJ, Sullivan B, Symes A, (2012) Seabird conservation status, threats and priority actions: A global assessment. Bird Conserv Int 22(1):1–34.
  • R1851 - Langendoen, T, Mundkur, T. & Nagy, S., (2021) Flyway trend analyses based on data from the Asian Waterbird Census from the period of 1987-2020. Online publication. Wetlands International, Wageningen, The Netherlands.
  • R1958 - Ministry of the Environment Japan. 2021. Monitoring site 1000 & Small Island Seabird Surveys 2004-2018 Summary Report. Ministry of the Environment, Natural Environment Bureau, Biodiversity Center, Japan.
  • R1962 - Senzaki M, Terui A, Tomita N, Sato F, Fukuda Y, KataokaY & Watanuki Y (2020) Long-term declines in common breeding seabirds in Japan. Bird Conservation International 30: 434-446.

Notes

  • S2097 - Malling & Larsson 2002: Breeding population < 350,000 pairs (1,050,000 individuals).
  • S7187 - Malling & Larsson 2002: Breeding population < 350,000 pairs (1,050,000 individuals).
  • S9622 - No information available for a new assessment; previous estimate from Malling and Larsson (2002). The KR mean non-breeding population is 35,832 (between 2016-2020), based on Winter Waterbird Census of Korea by NIBR.
  • T7769 - The IWC analysis (Langendoen et al., 2021) reports a stable trend for 2011-2020 (0.9859) and an increasing trend over 2000-2020 (1.0317). The trend is based on only 2 countries (KR and JP) and is therefore not considered representative of the population. In KR it is STA for 10 years (2011-2020), based on Winter Waterbird Census of Korea by NIBR. In JP (Ministry of the Environment Japan. 2021) numbers decreased by 72% from 1980 to 2015 as per analysis of the Japanese Seabird Colony Database and Senzaki et al. (2020).



Copyright Wetlands International 2012

Citation: Wetlands International (). "Waterbird Population Estimates" . Retrieved from wpe.wetlands.org on