Population information

Order name Charadriiformes
Family name Laridae
Scientific name Gelochelidon nilotica Common name Common Gull-billed Tern
Population name vanrossemi
Breeding range Coastal California to Mexico Non-breeding range Unknown, Mexico & C America?
Red List Category Least Concern
Ramsar regions Neotropics North America
Notes Taxonomy of W Mexico population uncertain (Parnell et al. 2005).

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 0 0 -1 -1
WPE 4 0 0 -1 -1
WPE 1 0 0 -1 -1
WPE 2 0 0 -1 -1
WPE 5 2006 2007 2,100 2,400 [S7305] [R1142] [R1162]

Population trends

Publication Start year End year Trend Trend quality Notes References Actions
WPE 3 1991 2001 STA [R510]
WPE 4 1991 2001 STA [R510]
WPE 1 0 0 Unknown
WPE 2 0 0 Unknown
WPE 5 2006 2007 DEC [R1162] [R1142]

Population 1% level

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

References

  • R510 - Parnell, J.F., Erwin, R.M. and Molina, K.C. 1995. Gull-billed Tern (Sterna nilotica). In: The birds of North America, No 140. (A. Poole and F. Gill, eds.). The Academy of Natural Sciences, Philadelphia, PA and The American Ornithologists' Union, Washington D.
  • R1142 - Palacios, E. and Mellink, E. 2007. The Colonies of Van Rossem?s Gull-billed Tern (Gelochelidon nilotica vanrossemi) in M?xico. Waterbirds 30(2): 214-222.
  • R1162 - Shuford, W. D., and Gardali, T., (eds). 2008. California Bird Species of Special Concern: A ranked assessment of species, subspecies, and distinct populations of birds of immediate conservation concern in California. Studies of Western Birds 1. Western Field Ornithologists, Camarillo, California, and California Department of Fish and Game, Sacramento.

Notes

  • S7305 - 600 pairs in Mexico; 100-200 pairs in California .



Copyright Wetlands International 2012

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