NT
Chuck-will's-widow Antrostomus carolinensis



Taxonomy

Taxonomic note
Antrostomus carolinensis (del Hoyo and Collar 2014) was previously placed in the genus Caprimulgus.

Taxonomic source(s)
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.

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

Red List history
Year Category Criteria
2020 Near Threatened A2ace+3ce+4ace
2018 Near Threatened A2ace+3ce+4ace
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 Medium
Land mass type Average mass 109 g
Distribution

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 3,570,000 medium
Extent of Occurrence non-breeding (km2) 7,160,000 medium
Number of locations -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals 5700000 poor estimated 2019
Population trend Decreasing estimated -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) 20-29 - - -
Decline (10 years/3 generation past and future) 20-29 - - -
Number of subpopulations - - -
Percentage in largest subpopulation - - -
Generation length (yrs) 4.01 - - -

Population justification: Partners in Flight (2019) estimated the global population of mature individuals at 5,700,000.

Trend justification:

Partners in Flight (2019) estimate the population of A. carolinensis to be declining at 2.275% per year, which equates to a ~24% decline over the last three generations (12 years). Similar declining trends are further supported by Rosenberg et al. (2016), the Christmas Bird Count (T. Meehan in litt. 2018) and the North American Breeding Bird Survey (Sauer et al. 2017). As a result, current declines are placed in the range 20-29% over three generations.


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Antigua and Barbuda N Extant Yes
Aruba (to Netherlands) N Extant Yes
Bahamas N Extant Yes Yes
Barbados N Extant Yes
Belize N Extant Yes
Bonaire, Sint Eustatius and Saba (to Netherlands) N Extant Yes
Canada N Extant Yes
Cayman Islands (to UK) N Extant Yes
Colombia N Extant Yes
Costa Rica N Extant Yes
Cuba N Extant Yes
Dominica N Extant Yes
Dominican Republic N Extant Yes
El Salvador N Extant Yes
Guatemala N Extant Yes
Haiti N Extant Yes
Honduras N Extant Yes
Jamaica V Extant
Martinique (to France) N Extant Yes
Mexico N Extant Yes
Montserrat (to UK) N Extant Yes
Nicaragua N Extant Yes
Panama N Extant Yes
Puerto Rico (to USA) N Extant Yes
St Kitts and Nevis N Extant Yes
St Lucia N Extant Yes
St Pierre and Miquelon (to France) V Extant Yes
St Vincent and the Grenadines N Extant Yes
Turks and Caicos Islands (to UK) N Extant Yes
USA N Extant Yes Yes Yes
Venezuela N Extant Yes
Virgin Islands (to UK) N Extant Yes
Virgin Islands (to USA) N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Bahamas Grog Pond
Bahamas Red Bays

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Pastureland suitable breeding
Caves and Subterranean Habitats (non-aquatic) Caves marginal non-breeding
Forest Subtropical/Tropical Dry suitable non-breeding
Forest Subtropical/Tropical Dry suitable breeding
Forest Temperate suitable breeding
Grassland Temperate suitable breeding
Shrubland Subtropical/Tropical Dry suitable non-breeding
Shrubland Temperate suitable breeding
Altitude 0 - 2600 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Human intrusions & disturbance Recreational activities Timing Scope Severity Impact
Ongoing Minority (<50%) No decline Low Impact: 4
Stresses
Species disturbance
Pollution Agricultural & forestry effluents - Herbicides and pesticides Timing Scope Severity Impact
Ongoing Minority (<50%) Unknown Unknown
Stresses
Competition
Residential & commercial development Housing & urban areas Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Transportation & service corridors Roads & railroads Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion, Species mortality

Recommended citation
BirdLife International (2021) Species factsheet: Antrostomus carolinensis. Downloaded from http://www.birdlife.org on 23/04/2021. Recommended citation for factsheets for more than one species: BirdLife International (2021) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 23/04/2021.