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

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.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	D1

Red List history

Year	Category	Criteria
2020	Critically Endangered	C2a(i)
2018	Critically Endangered	C2a(i)
2016	Critically Endangered	C2a(i)
2015	Critically Endangered	C2a(i)
2013	Critically Endangered	C2a(i)
2012	Critically Endangered	C2a(i)
2010	Critically Endangered	C2a(i)
2009	Critically Endangered	C2a(i)
2008	Critically Endangered
2004	Critically Endangered
2000	Critically Endangered
1996	Endangered
1994	Endangered
1988	Threatened

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

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	26,700 km2	medium
Number of locations	2-5	-
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	322 mature individuals	medium	estimated	2019
Population trend	increasing	medium	observed	-
Generation length	8.17 years	-	-	-
Number of subpopulations	2-100	-	-	-

Population justification: This species has an extremely small and fragmented population, which was previously in steep decline, with a 21% reduction in breeding pairs from 2006-2009, and as few as 109 breeding pairs in 2009 (Woolaver 2011). In 2014 The Peregrine Fund recorded 120 territorial pairs in Los Haitises and two pairs in Punta Cana (The Peregrine Fund 2014). In 2016 they recorded 120 territorial pairs in Los Haitises and 12 pairs in Punta Cana (T. Hayes unpubl. data). In 2019, The Peregrine Fund recorded 142 pairs of Ridgway’s Hawks in Los Haitises and 19 pairs in Punta Cana. These 19 pairs of hawks successfully produced 17 fledglings in 2019 and two additional young were fostered into nests in Punta Cana. Additionally, some areas in Los Haitises are not being consistently monitored, however we know that some pairs of hawks continue to exist outside the monitored area. The total number of Ridgway’s Hawks is estimated at a minimum of 427 individuals and 322 mature individuals.

Trend justification: Until the past decade, the population of Ridgway's Hawks was observed to be in rapid decline, with monitoring exhibiting 5-10% annual population declines, which equates to declines of up to 80% over three generations (c.24.5 years). However, through successful conservation action, ongoing monitoring and hands-on management of nests/nestlings in Los Haitises shows that population decline has now reversed and is trending upwards. In Los Limones, one of four regions in Los Haitises where The Peregrine fund is managing the population, the number of pairs has grown from 37 pairs in 2011 to 76 pairs in 2019, a 105% increase in nesting pairs over 8 years (T. Hayes unpubl. data). Significant population increases are ongoing and this marked increase in the Ridgway’s Hawk population is a direct result of conservation efforts by The Peregrine Fund and their project partners.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Dominican Republic	extant	native	yes
Haiti	extant	native	yes

Country/Territory	IBA Name
Dominican Republic	Haitises National Park

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Artificial/Terrestrial	Arable Land	marginal	non-breeding
Forest	Subtropical/Tropical Dry	major	resident
Forest	Subtropical/Tropical Moist Lowland	major	resident
Forest	Subtropical/Tropical Moist Montane	major	resident
Altitude	0 - 2000 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Annual & perennial non-timber crops - Shifting agriculture	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Very Rapid Declines		High Impact: 8
		Stresses Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture	Annual & perennial non-timber crops - Small-holder farming	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion
Biological resource use	Hunting & trapping terrestrial animals - Persecution/control	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Rapid Declines		Medium Impact: 6
		Stresses Species mortality
Biological resource use	Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation
Climate change & severe weather	Storms & flooding	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Negligible declines		Low Impact: 5
		Stresses Ecosystem degradation, Reduced reproductive success
Human intrusions & disturbance	Work & other activities	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Species disturbance, Reduced reproductive success
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Named species	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Species mortality
Invasive and other problematic species, genes & diseases	Problematic native species/diseases	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Negligible declines		Low Impact: 5
		Stresses Species mortality
Transportation & service corridors	Utility & service lines	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Species mortality

---

Recommended citation
BirdLife International (2024) Species factsheet: Ridgway's Hawk Buteo ridgwayi. Downloaded from https://datazone.birdlife.org/species/factsheet/ridgways-hawk-buteo-ridgwayi on 22/11/2024.
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 22/11/2024.