NT
Killdeer Charadrius vociferus



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.
Cramp, S. and Simmons, K.E.L. (eds). 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. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
SACC. 2005 and updates. A classification of the bird species of South America. Available at: https://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
2024 Near Threatened A2bc+4bc
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) 40,000,000 km2 medium
Extent of Occurrence (non-breeding) 26,500,000 km2 medium
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size 2300000 mature individuals poor estimated 2023
Population trend decreasing - estimated 2012-2025
Rate of change over the past 10 years/3 generations (longer of the two periods) 14-27,22% - - -
Rate of change over the past & future 10 years/3 generations (longer of the two periods) 14-27,22% - - -
Generation length 4.24 years - - -
Number of subpopulations 3 - - -
Percentage of mature individuals in largest subpopulation 100% - - -

Population justification: This species is widespread and very commonly observed. The global population is estimated to number 2,300,000 mature individuals (Partners in Flight 2023).

Trend justification:

A reduction of 22.0% (-26.9 to -18.0%) within three generations was estimated in the Avian Conservation Assessment Database December 2023 update (Partners in Flight 2023) based on modelled Breeding Bird Survey data. This species is abundant and commonly observed and this trend is considered well-supported. The above rate of decline is supported by an analysis of eBird trend data which estimated a three-generation reduction of 18.3% (-22.8 to -14.3%) (Fink et al. 2023).

Data from the North American Breeding Bird Survey and Christmas Bird Count indicate declines of c.19% and c.13% respectively in the three-generation period 2008-2021, with no indication the rate is slowing (Meehan et al. 2022, Ziolkowski Jr. et al. 2022). The Central American Waterbird Census found a moderate decrease (-16%) over the period 2012–2020 during the winter period in southern Mexico and Central America (van Dort et al. 2023). Although low, numbers wintering at Tomales Bay in California are declining and are thought to reflect population decreases elsewhere in the west (Warnock et al. 2021).

A recent analysis of migration count data at stopover locations throughout North America (Smith et al. 2023) also indicates declines, though only covers part of the population. A reduction of 37.0% was estimated over three generations, albeit within a wide confidence band of -63.8% to -1.1%.

Overall, based on data sources that cover most of the species’ range, a reduction exceeding 20% in three generations is estimated. Uncertainty over the future rate of decline means that a value for the future three generations is not determined.


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

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Arable Land suitable resident
Artificial/Terrestrial Pastureland suitable resident
Artificial/Terrestrial Urban Areas suitable resident
Marine Intertidal Rocky Shoreline suitable resident
Marine Intertidal Salt Marshes (Emergent Grasses) suitable resident
Marine Intertidal Sandy Shoreline and/or Beaches, Sand Bars, Spits, Etc suitable resident
Marine Intertidal Shingle and/or Pebble Shoreline and/or Beaches suitable resident
Wetlands (inland) Bogs, Marshes, Swamps, Fens, Peatlands major resident
Wetlands (inland) Permanent Rivers/Streams/Creeks (includes waterfalls) suitable resident
Altitude 0 - 2500 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops - Agro-industry farming Timing Scope Severity Impact
Ongoing Minority (<50%) Unknown Unknown
Stresses
Species disturbance, Ecosystem conversion, Reduced reproductive success
Biological resource use Hunting & trapping terrestrial animals - Intentional use (species is the target) Timing Scope Severity Impact
Ongoing Minority (<50%) Negligible declines Low Impact: 4
Stresses
Species mortality
Human intrusions & disturbance Recreational activities Timing Scope Severity Impact
Ongoing Minority (<50%) Negligible declines Low Impact: 4
Stresses
Species disturbance
Pollution Agricultural & forestry effluents - Herbicides and pesticides Timing Scope Severity Impact
Ongoing Unknown Unknown Unknown
Stresses
Species mortality
Residential & commercial development Commercial & industrial areas Timing Scope Severity Impact
Ongoing Minority (<50%) Negligible declines Low Impact: 4
Stresses
Ecosystem conversion
Residential & commercial development Housing & urban areas Timing Scope Severity Impact
Ongoing Minority (<50%) Negligible declines Low Impact: 4
Stresses
Ecosystem conversion

Utilisation
Purpose Scale
Food - human subsistence, national
Sport hunting/specimen collecting subsistence, national

Recommended citation
BirdLife International (2024) Species factsheet: Killdeer Charadrius vociferus. Downloaded from https://datazone.birdlife.org/species/factsheet/killdeer-charadrius-vociferus on 12/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org/species/search on 12/12/2024.