This species has a very large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population is declining only slowly, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size is very large, and hence does not approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern. The long term impact of West Nile virus on the population is being monitored, and if the population is found to be declining more rapidly than currently thought, it will warrant uplisting to a higher threat category.
AOU. 1998. Check-list of North American birds. American Ornithologists' Union, Washington, D.C.
Sibley, C. G.; Monroe, B. L. 1990. Distribution and taxonomy of birds of the world. Yale University Press, New Haven, USA.
Use of the genus Psilorhinus follows AOU (2010).
Airola, D. A.; Hampton, S.; Manolis, T. 2007. Effects of West Nile Virus on sensitive species in the Lower Sacramento Valley, California: An evaluation using Christmas Bird Counts. Central Valley Bird Club Bulletin 10: 1-22.
Butcher, G.S. and Niven, D.K. 2007. Combining data from the Christmas Bird Count and the Breeding Bird Survey to determine the continental status and trends of North American birds. National Audobon Society, New York, USA.
Crosbie, S. P.; Koenig, W. D.; Reisen, W. K.; Kramer, V. L.; Marcus, L.; Carney, R.; Pandolfino, E.; Bolen, G. M.; Crosbie, L. R.; Bell, D. A.; Ernest, H. B. 2008. Early impact of West Nile Virus on the Yellow-billed Magpie (Pica nuttalli). The Auk 125(3): 542-550.
Reisen, W.; Lothrop, H.; Chiles, R.; Madon, M.; Cossen, C.; Woods, L.; Husted, S.; Kramer, V.; Edman, J. 2004. West Nile Virus in California. . Emerging and Infectuous Diseases 10: 1369-1378.
Rich, T.D.; Beardmore, C.J.; Berlanga, H.; Blancher, P.J.; Bradstreet, M.S.W.; Butcher, G.S.; Demarest, D.W.; Dunn, E.H.; Hunter, W.C.; Inigo-Elias, E.E.; Martell, A.M.; Panjabi, A.O.; Pashley, D.N.; Rosenberg, K.V.; Rustay, C.M.; Wendt, J.S.; Will, T.C.
Further web sources of information
Hear sounds for this species from xeno-canto, the community database of shared bird sounds from around the world.
Text account compilers
Butchart, S., Ekstrom, J., Sharpe, C J, Derh, M.
IUCN Red List evaluators
Butchart, S., Symes, A.
BirdLife International (2013) Species factsheet: Pica nuttalli. Downloaded from http://www.birdlife.org on 11/12/2013. Recommended citation for factsheets for more than one species: BirdLife International (2013) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 11/12/2013.
This information is based upon, and updates, the information published in BirdLife International (2000) Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004) Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.
To provide new information to update this factsheet or to correct any errors, please email BirdLife
To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.
|Current IUCN Red List category||Least Concern|
|Family||Corvidae (Crows and jays)|
|Species name author||(Audubon, 1837)|
|Population size||mature individuals|
|Distribution size (breeding/resident)||83,500 km2|
|Links to further information|
|- Additional Information on this species|