Population information

Order name Gruiformes
Family name Rallidae
Scientific name Rallus obsoletus Common name Ridgway's Rail
Population name obsoletus
Breeding range C California, mainly San Fransisco Bay Non-breeding range
Red List Category Near Threatened
Ramsar regions North America
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 1995 1995 400 400 [R178]
WPE 4 1995 1995 400 400 [R178]
WPE 1 0 0 -1 -1
WPE 2 0 0 -1 -1
WPE 3 1995 1995 400 400 [R178]
WPE 4 1995 1995 400 400 [R178]
WPE 1 0 0 -1 -1
WPE 2 0 0 -1 -1
WPE 3 1995 1995 400 400 [R178]
WPE 4 1995 1995 400 400 [R178]
WPE 1 0 0 -1 -1
WPE 2 0 0 -1 -1
WPE 3 1995 1995 400 400 [R178]
WPE 4 1995 1995 400 400 [R178]
WPE 1 0 0 -1 -1
WPE 2 0 0 -1 -1
WPE 3 1995 1995 400 400 [R178]
WPE 4 1995 1995 400 400 [R178]
WPE 1 0 0 -1 -1
WPE 2 0 0 -1 -1
WPE 5 2005 2008 1,400 1,450 Expert opinion [R1119]

Population trends

Publication Start year End year Trend Trend quality Notes References Actions
WPE 3 1981 1991 DEC [R178]
WPE 4 1981 1991 DEC [R178]
WPE 1 0 0 Unknown
WPE 2 0 0 Unknown
WPE 3 1981 1991 DEC [R178]
WPE 4 1981 1991 DEC [R178]
WPE 1 0 0 Unknown
WPE 2 0 0 Unknown
WPE 3 1981 1991 DEC [R178]
WPE 4 1981 1991 DEC [R178]
WPE 1 0 0 Unknown
WPE 2 0 0 Unknown
WPE 3 1981 1991 DEC [R178]
WPE 4 1981 1991 DEC [R178]
WPE 1 0 0 Unknown
WPE 2 0 0 Unknown
WPE 3 1981 1991 DEC [R178]
WPE 4 1981 1991 DEC [R178]
WPE 1 0 0 Unknown
WPE 2 0 0 Unknown
WPE 5 2000 2008 INC [R1119]

Population 1% level

Publication Yearset 1 percent Note
WPE 3 2002 4
WPE 4 2006 4
WPE 1 0 -1
WPE 2 0 -1
WPE 3 2002 4
WPE 4 2006 4
WPE 1 0 -1
WPE 2 0 -1
WPE 3 2002 4
WPE 4 2006 4
WPE 1 0 -1
WPE 2 0 -1
WPE 3 2002 4
WPE 4 2006 4
WPE 1 0 -1
WPE 2 0 -1
WPE 3 2002 4
WPE 4 2006 4
WPE 1 0 -1
WPE 2 0 -1
WPE 5 2012 15

References

  • R178 - del Hoyo, J., Elliot, A. and Sargatal, J. (eds). 1996. Handbook of the Birds of the World. Volume 3: Hoatzin to Auks. Lynx Edicions, Barcelona.
  • R1119 - Liu, L., Wood, J., Nur, N., Stralberg, D. and Herzog, M. 2009. California Clapper Rail (Rallus longirostris obsoletus) Population Monitoring: 2005-2008. California Department of Fish and Game.

Notes




Copyright Wetlands International 2012

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