Population information

Order name Gruiformes
Family name Rallidae
Scientific name Hypotaenidia okinawae Common name Okinawa Rail
Population name Okinawa
Breeding range N Okinawa, Ryuku Is, Japan Non-breeding range
Red List Category Endangered
Ramsar regions Asia
Notes

Conservation Framework

Conservation framework Notes
No conservation frameworks
Note:

Population size

Publication Start year End year Minimum Maximum Estimate quality Notes References Actions
WPE 3 1999 1999 1,500 2,100 [R68]
WPE 4 2001 2001 1,200 1,700 [S294] [R507]
WPE 1 1992 1992 1,800 1,800 [R714]
WPE 2 1992 1992 1,800 1,800 [R714]
WPE 5 2001 2001 1,200 1,700 [S6038] [R507]

Population trends

Publication Start year End year Trend Trend quality Notes References Actions
WPE 3 1990 2000 DEC [R68]
WPE 4 1992 2002 DEC [R507]
WPE 1 0 0 Unknown
WPE 2 0 0 Unknown
WPE 5 1992 2002 DEC [R507]

Population 1% level

Publication Yearset 1 percent Note
WPE 3 0 -1
WPE 4 2006 15
WPE 1 1994 18
WPE 2 1997 18
WPE 5 2012 15

References

  • R68 - BirdLife International. (2000). Threatened Birds of the World. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife international
  • R507 - Ozaki, K., Baba, T., Komeda, S. Kinjyo, M., Toguchi, Y., and Harato, T. (2002) The declining distribution of the Okinawa Rail Gallirallus okinawae. J. Yamashina Inst. Ornithol. 34: 136-144.
  • R714 - Yanagisawa, N., Fujimaki, Y. and Higuchi, H. (pers. comm.). 1993. Japanese data on waterbird population sizes, summarised for IWRB.

Notes

  • S294 - 291 estimated the population to be c.900 pairs or 1,500-2,100 birds. O11 reported a reduction in extent of occurrence by 20%, giving a revised estimate of 1,200-1,680 birds.
  • S6038 - Hanawa and Morishita (1986) estimated the population to be c.900 pairs or 1,500-2,100 birds. Ozaki et al. 2002 reported a reduction in extent of occurrence by 20%, giving a revised estimate of 1,200-1,680 birds.



Copyright Wetlands International 2012

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