Population information

Nom ordre Gruiformes
Nom famille Rallidae
Nom scientifique Rallus obsoletus Nom courant Ridgway's Rail
Nom population obsoletus
Aire de reproduction C California, mainly San Fransisco Bay Aire de non-reproduction
Catégorie de la Liste Rouge Near Threatened
Regions Ramsar North America
Notes

Réseau de conservation

Réseau de conservation Notes
Pas des Réseaux de conservation
Note:

Taille de population

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