Population information

Order name Gruiformes
Family name Rallidae
Scientific name Rallus obsoletus Common name Ridgway's Rail
Population name yumanensis
Breeding range SE California, SW Arizona & NW Mexico Non-breeding range
Red List Category Near Threatened
Ramsar regions Neotropics 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 1993 1993 2,100 2,100 [R207]
WPE 4 1993 1993 2,100 2,100 [R207]
WPE 1 0 0 -1 -1
WPE 2 0 0 -1 -1
WPE 3 1993 1993 2,100 2,100 [R207]
WPE 4 1993 1993 2,100 2,100 [R207]
WPE 1 0 0 -1 -1
WPE 2 0 0 -1 -1
WPE 3 1993 1993 2,100 2,100 [R207]
WPE 4 1993 1993 2,100 2,100 [R207]
WPE 1 0 0 -1 -1
WPE 2 0 0 -1 -1
WPE 3 1993 1993 2,100 2,100 [R207]
WPE 4 1993 1993 2,100 2,100 [R207]
WPE 1 0 0 -1 -1
WPE 2 0 0 -1 -1
WPE 3 1993 1993 2,100 2,100 [R207]
WPE 4 1993 1993 2,100 2,100 [R207]
WPE 1 0 0 -1 -1
WPE 2 0 0 -1 -1
WPE 5 1998 2008 5,200 8,380 [S6097] [R1089] [R1276]

Population trends

Publication Start year End year Trend Trend quality Notes References Actions
WPE 3 1982 1992 DEC [R178]
WPE 4 1982 1992 DEC [R178]
WPE 1 0 0 Unknown
WPE 2 0 0 Unknown
WPE 3 1982 1992 DEC [R178]
WPE 4 1982 1992 DEC [R178]
WPE 1 0 0 Unknown
WPE 2 0 0 Unknown
WPE 3 1982 1992 DEC [R178]
WPE 4 1982 1992 DEC [R178]
WPE 1 0 0 Unknown
WPE 2 0 0 Unknown
WPE 3 1982 1992 DEC [R178]
WPE 4 1982 1992 DEC [R178]
WPE 1 0 0 Unknown
WPE 2 0 0 Unknown
WPE 3 1982 1992 DEC [R178]
WPE 4 1982 1992 DEC [R178]
WPE 1 0 0 Unknown
WPE 2 0 0 Unknown
WPE 5 1998 2008 STA? No idea [R1089]

Population 1% level

Publication Yearset 1 percent Note
WPE 3 2002 20
WPE 4 2006 20
WPE 1 0 -1
WPE 2 0 -1
WPE 3 2002 20
WPE 4 2006 20
WPE 1 0 -1
WPE 2 0 -1
WPE 3 2002 20
WPE 4 2006 20
WPE 1 0 -1
WPE 2 0 -1
WPE 3 2002 20
WPE 4 2006 20
WPE 1 0 -1
WPE 2 0 -1
WPE 3 2002 20
WPE 4 2006 20
WPE 1 0 -1
WPE 2 0 -1
WPE 5 2012 65

References

  • R207 - Eddleman, W.R. and Conway, C.J. 1994. Clapper Rail. Pages 167-179 In: Migratory shorebird and upland game bird management in North America. (Tacha, T.C. and Braun, C.E (eds.)
  • 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.
  • R1089 - Hinojosa-Huerta, O., Rivera-D?az, J., Iturribarr?a-Rojas, H. and Calvo-Fonseca, A. 2008. Population trends of Yuma Clapper Rails in the Colorado River Delta, Mexico.Studies in Avian Biology No. 37: 69-73.
  • R1276 - U.S. Fish and Wildlife Service. 2009a. Yuma Clapper Rail (Rallus longirostris yumanensis) Recovery Plan. Draft First Revision. U.S. Fish and Wildlife Service, Southwest Region, Albuquerque, New Mexico.

Notes

  • S6097 - 4,698?7,482 for Colorado River Delta in Mexico; 503-890 California.



Copyright Wetlands International 2012

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