LC
Willet Tringa semipalmata



Taxonomy

Taxonomic note
Tringa semipalmata (del Hoyo and Collar 2014) was previously placed in the genus Catoptrophorus as C. semipalmatus.

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#.

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 -
Distribution

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 16,300,000 medium
Extent of Occurrence non-breeding (km2) 37,900,000 medium
Number of locations -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals poor estimated 2009
Population trend Stable suspected -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) - - -
Decline (10 years/3 generation past and future) - - -
Number of subpopulations - - -
Percentage in largest subpopulation - - -
Generation length (yrs) 7.5 - - -

Trend justification: The overall population trend is stable, although some populations have unknown trends (Wetlands International 2006). This species has had stable population trends 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 Occurrence status Presence Resident Breeding Non-breeding Passage
Anguilla (to UK) N Extant
Antigua and Barbuda N Extant
Argentina N Extant
Aruba (to Netherlands) N Extant
Bahamas N Extant
Barbados N Extant
Belize N Extant
Bermuda (to UK) N Extant
Bonaire, Sint Eustatius and Saba (to Netherlands) N Extant Yes
Brazil N Extant
Canada N Extant Yes Yes
Cayman Islands (to UK) N Extant
Chile N Extant
Colombia N Extant
Costa Rica N Extant Yes
Cuba N Extant
Curaçao (to Netherlands) N Extant Yes
Dominica N Extant
Dominican Republic N Extant
Ecuador N Extant Yes
El Salvador N Extant
Finland V Extant
France V Extant
French Guiana N Extant
Grenada N Extant
Guadeloupe (to France) N Extant Yes
Guatemala N Extant
Guyana N Extant
Haiti N Extant
Honduras N Extant
Jamaica N Extant Yes
Martinique (to France) N Extant
Mexico N Extant
Montserrat (to UK) N Extant
Nicaragua N Extant
Norway V Extant
Panama N Extant
Peru N Extant
Portugal V Extant
Puerto Rico (to USA) N Extant
Sint Maarten (to Netherlands) N Extant Yes
St Barthelemy (to France) N Extant
St Kitts and Nevis N Extant
St Lucia N Extant
St Martin (to France) N Extant Yes
St Pierre and Miquelon (to France) N Extant Yes
St Vincent and the Grenadines N Extant
Suriname N Extant
Trinidad and Tobago N Extant Yes
Turks and Caicos Islands (to UK) N Extant
United States Minor Outlying Islands (to USA) V Extant
Uruguay V Extant Yes
USA N Extant Yes
Venezuela N Extant
Virgin Islands (to UK) N Extant Yes
Virgin Islands (to USA) N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Ecuador Archipiélago de Jambelí
Jamaica Yallahs
Bahamas Great Inagua
Bahamas Harrold and Wilson Ponds National Park
Bahamas Grog Pond
Canada Chappice Lake
Canada North, West, and East Shoal Lakes
Canada Eastern Cape Sable Island
Canada Malpeque Bay
Canada Bedeque Bay
Canada PEI National Park
Canada Last Mountain Lake National Wildlife Area
Canada Eyebrow Lake
Puerto Rico (to USA) Jobos Bay
St Vincent and the Grenadines Ashton Wetland
St Vincent and the Grenadines Mustique Island
Bahamas Gilliam Bay
Bahamas Low Cay, High Cay and Sandy Hook
Bahamas South Beach Tidal Flats
Panama Upper Bay of Panamá
Antigua and Barbuda McKinnons Salt Pond
Antigua and Barbuda Fitches Creek Bay
Costa Rica Nicoya Gulf mangroves and coastal areas
Bahamas Mangrove Cay
Cuba Cayo Sabinal, Ballenatos y Manglares de la Bahía de Nuevitas
Bahamas Cat Island Wetlands
Puerto Rico (to USA) Suroeste
St Lucia Point Sables
Anguilla (to UK) East End Pond
Anguilla (to UK) Dog Island
Anguilla (to UK) Scrub Island
Virgin Islands (to USA) Great Pond
Virgin Islands (to USA) Southgate and Green Cay
Anguilla (to UK) Cove Pond
Anguilla (to UK) Long Salt Pond
Cayman Islands (to UK) Central Mangrove Wetland
Cayman Islands (to UK) Crown Wetlands
Virgin Islands (to USA) John Brewer's Bay
Bahamas North Atlantic Abaco Cays
Bahamas Red Bays
Jamaica Black River Great Morass
Mexico Bahía Santa María
Mexico Delta del Río Colorado
Cuba Humedal Sur de Sancti Spiritus
Mexico Ensenada de Pabellones
Mexico Humedales Costeros del Norte de la Península de Yucatán
Mexico Sistema Tóbari
Mexico Ría Lagartos
French Guiana Littoral
French Guiana Littoral Sinnamary
French Guiana Littoral Kourou
French Guiana Littoral Macouria
French Guiana Ile de Cayenne
French Guiana Plaine Kaw et Pointe Béhague
Trinidad and Tobago West Coast Mudflats
USA Cape Hatteras National Seashore
Mexico Istmo de Tehuantepec - Mar Muerto
Bahamas Joulter Cays
Mexico Istmo de Tehuantepec
Mexico Estero Cardonal
Brazil Mangue Seco
Brazil Reentrâncias Maranhenses / Paraenses
Brazil Baixada Maranhense
Brazil Delta do Parnaíba

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Marine Intertidal Mud Flats and Salt Flats suitable non-breeding
Marine Intertidal Rocky Shoreline suitable non-breeding
Marine Intertidal Salt Marshes (Emergent Grasses) major non-breeding
Marine Intertidal Salt Marshes (Emergent Grasses) major breeding
Marine Intertidal Sandy Shoreline and/or Beaches, Sand Bars, Spits, Etc suitable non-breeding
Marine Intertidal Shingle and/or Pebble Shoreline and/or Beaches suitable non-breeding
Marine Intertidal Tidepools suitable non-breeding
Wetlands (inland) Bogs, Marshes, Swamps, Fens, Peatlands major breeding
Altitude   Occasional altitudinal limits  

Recommended citation
BirdLife International (2021) Species factsheet: Tringa semipalmata. Downloaded from http://www.birdlife.org on 02/12/2021. Recommended citation for factsheets for more than one species: BirdLife International (2021) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 02/12/2021.