LC
Western Sandpiper Calidris mauri



Taxonomy

Taxonomic source(s)
AERC TAC. 2003. AERC TAC Checklist of bird taxa occurring in Western Palearctic region, 15th Draft. Available at: #http://www.aerc.eu/DOCS/Bird_taxa_of _the_WP15.xls#.
AERC TAC. 2003. AERC TAC Checklist of bird taxa occurring in Western Palearctic region, 15th Draft. Available at: #http://www.aerc.eu/DOCS/Bird_taxa_of _the_WP15.xls#.
Cramp, S. and Perrins, C.M. 1977-1994. Handbook of the birds of Europe, the Middle East and Africa. The birds of the western Palearctic. Oxford University Press, Oxford.
Cramp, S.; Perrins, C. M. 1977-1994. Handbook of the birds of Europe, the Middle East and Africa. The birds of the western Palearctic. Oxford University Press, Oxford.
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
del Hoyo, J.; Collar, N. J.; Christie, D. A.; Elliott, A.; Fishpool, L. D. C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Barcelona, Spain and Cambridge UK: Lynx Edicions and BirdLife International.
SACC. 2006. A classification of the bird species of South America. Available at: #http://www.museum.lsu.edu/~Remsen/SACCBaseline.html#.
SACC. 2006. A classification of the bird species of South America. Available at: #http://www.museum.lsu.edu/~Remsen/SACCBaseline.htm#.
Turbott, E. G. 1990. Checklist of the birds of New Zealand. Ornithological Society of New Zealand, Wellington.
Turbott, E.G. 1990. Checklist of the birds of New Zealand. Ornithological Society of New Zealand, Wellington.

IUCN Red List criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - -

Red List history
Year Category Criteria
2016 Least Concern
2012 Least Concern
2009 Least Concern
2008 Least Concern
2004 Least Concern
2000 Lower Risk/Least Concern
1994 Lower Risk/Least Concern
1988 Lower Risk/Least Concern
Species attributes

Migratory status full migrant Forest dependency does not normally occur in forest
Land-mass type Average mass -
Range

Estimate Data quality
Extent of Occurrence (breeding/resident) 947,000 km2
Extent of Occurrence (non-breeding) 27,000,000 km2
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size unknown poor estimated 2009
Population trend decreasing - estimated -
Generation length 7.4 years - - -

Trend justification: This species has undergone a small or statistically insignificant decrease over the last 40 years in North America (data from Breeding Bird Survey and/or Christmas Bird Count: Butcher and Niven 2007).


Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
Anguilla (to UK) extant native
Antigua and Barbuda extant native
Aruba (to Netherlands) extant native
Bahamas extant native
Barbados extant native
Belize extant native yes
Bermuda (to UK) extant native
Bonaire, Sint Eustatius and Saba (to Netherlands) extant native
Canada extant native yes
Cayman Islands (to UK) extant native
Chile extant native
Colombia extant native
Costa Rica extant native yes
Cuba extant native
Curaçao (to Netherlands) extant native
Dominica extant native
Dominican Republic extant native
Ecuador extant native
El Salvador extant native
France extant vagrant
French Guiana extant native
Grenada extant native
Guadeloupe (to France) extant native yes
Guatemala extant native
Guyana extant native
Haiti extant native
Honduras extant native
Ireland extant vagrant
Jamaica extant native yes
Japan extant vagrant
Martinique (to France) extant native
Mexico extant native
Montserrat (to UK) extant native
New Zealand extant vagrant
Nicaragua extant native
Panama extant native
Peru extant native
Portugal extant vagrant
Puerto Rico (to USA) extant native
Russia extant native
Russia (Asian) extant native
Sint Maarten (to Netherlands) extant native
Spain extant vagrant
St Barthelemy (to France) extant native
St Kitts and Nevis extant native
St Lucia extant native
St Martin (to France) extant native yes
St Pierre and Miquelon (to France) extant vagrant yes
St Vincent and the Grenadines extant native
Suriname extant native
Sweden extant vagrant
Taiwan, China extant vagrant
Trinidad and Tobago extant native yes
Turks and Caicos Islands (to UK) extant native
United Kingdom extant vagrant
United States Minor Outlying Islands (to USA) extant native
USA extant native yes
Venezuela extant native
Virgin Islands (to UK) extant native yes
Virgin Islands (to USA) extant native yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Venezuela Humedales Boca del Río Unare
Canada Tofino Mudflats
Canada Boundary Bay - Roberts Bank - Sturgeon Bank (Fraser River Estuary)
Panama Chorrera Bay
Panama Parita Bay
Panama Upper Bay of Panamá
Panama Chimán Wetlands
Costa Rica Nicoya Gulf mangroves and coastal areas
USA Salton Sea
USA Trading Bay
USA Redoubt Bay
USA Fox River Flats
USA Bear River Bay UT02
USA Copper River Delta
USA Stikine River Delta
Mexico Ensenada de Pabellones
Mexico Marismas Nacionales
Mexico Complejo Lagunar Ojo de Liebre
Mexico Delta del Río Colorado
Mexico Sistema Tóbari
Mexico Zonas Húmedas de Yávaros
Mexico Bahía Santa María
Mexico Istmo de Tehuantepec - Mar Muerto

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Grassland Tundra major breeding
Marine Coastal/Supratidal Coastal Brackish/Saline Lagoons/Marine Lakes suitable non-breeding
Marine Coastal/Supratidal Coastal Freshwater Lakes suitable non-breeding
Marine Intertidal Mud Flats and Salt Flats major non-breeding
Marine Intertidal Sandy Shoreline and/or Beaches, Sand Bars, Spits, Etc major non-breeding
Marine Neritic Estuaries major non-breeding
Altitude   Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Climate change & severe weather Habitat shifting & alteration Timing Scope Severity Impact
Future Whole (>90%) Unknown Unknown
Stresses
Indirect ecosystem effects, Ecosystem degradation

Recommended citation
BirdLife International (2024) Species factsheet: Calidris mauri. Downloaded from https://datazone.birdlife.org/species/factsheet/western-sandpiper-calidris-mauri on 27/02/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org on 27/02/2024.