• Summary
• Text account
• Data table and detailed info
• Distribution map
• Reference and further resources

Taxonomic note
Antrostomus noctitherus (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. 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.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	B1ab(i,ii,iii,v)	B1ab(i,ii,iii,v); C2a(i); D1+2

Red List history

Year	Category	Criteria
2016	Endangered	B1ab(i,ii,iii,v)
2012	Endangered	B1ab(i,ii,iii,v)
2011	Endangered	B1a+b(i,ii,iii)
2010	Critically Endangered	B1a+b(i,ii,iii)
2009	Critically Endangered	B1a+b(i,ii,iii)
2008	Critically Endangered
2004	Critically Endangered
2000	Critically Endangered
1996	Critically Endangered
1994	Critically Endangered
1988	Threatened

Migratory status	not a migrant	Forest dependency	High
Land mass type		Average mass	-

	Estimate	Data quality
Extent of Occurrence breeding/resident (km2)	2,500	good
Number of locations	2-5	-
Severely Fragmented		-

	Value	Data quality	Derivation	Year of estimate
No. of mature individuals	930-1300	medium	estimated	1993
Population trend	Decreasing	poor	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	3	-	-	-
Percentage in largest subpopulation		-	-	-
Generation length (yrs)	5.6	-	-	-

Population justification: The estimate of 930-1,300 mature individuals (roughly equivalent to 1,400-2,000 individuals in total) was estimated based on 712 calling males found within 66% of the suitable habitat within its known range.

Trend justification: This species's population is suspected to be in decline owing to the continued loss and degradation of its habitat for residential, industrial and recreational development, amongst other related and unrelated threats.

Country/Territory	Occurrence status	Presence	Resident	Breeding	Non-breeding	Passage
Puerto Rico (to USA)	N	Extant		Yes

Country/Territory	IBA Name
Puerto Rico (to USA)	Sierra Bermeja and Laguna Cartagena
Puerto Rico (to USA)	Karso del Sur
Puerto Rico (to USA)	Maricao and Susúa
Puerto Rico (to USA)	Guaniquilla and Boquerón
Puerto Rico (to USA)	Suroeste
Puerto Rico (to USA)	Salinas de Punta Cucharas

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Artificial/Terrestrial	Plantations	suitable	resident
Forest	Subtropical/Tropical Dry	major	resident
Forest	Subtropical/Tropical Moist Lowland	suitable	resident
Shrubland	Subtropical/Tropical Dry	suitable	resident
Altitude	0 - 620 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Energy production & mining	Oil & gas drilling	Timing		Scope		Severity		Impact
		Future		Minority (<50%)		Slow, Significant Declines		Low Impact: 3
		Stresses Species disturbance, Ecosystem degradation, Reduced reproductive success
Energy production & mining	Renewable energy	Timing		Scope		Severity		Impact
		Future		Minority (<50%)		Slow, Significant Declines		Low Impact: 3
		Stresses Ecosystem degradation, Ecosystem conversion
Human intrusions & disturbance	Recreational activities	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		No decline		Low Impact: 5
		Stresses Species disturbance
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Felis catus	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		No decline		Low Impact: 4
		Stresses Reduced reproductive success
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Named species	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		No decline		Low Impact: 4
		Stresses Species mortality
Invasive and other problematic species, genes & diseases	Problematic native species/diseases	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		No decline		Low Impact: 4
		Stresses Reduced reproductive success
Residential & commercial development	Commercial & industrial areas	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		No decline		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion
Residential & commercial development	Housing & urban areas	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Unknown		Unknown
		Stresses Ecosystem degradation, Ecosystem conversion

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Recommended citation
BirdLife International (2023) Species factsheet: Antrostomus noctitherus. Downloaded from http://www.birdlife.org on 23/03/2023. Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 23/03/2023.