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

Taxonomic note
Rhabdotorrhinus waldeni (del Hoyo and Collar 2014) was previously placed in the genus Aceros.

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
A2cd	A2cd; C2a(i)	A2cd; B1ab(i,ii,iii,iv,v); C2a(i); D2

Red List history

Year	Category	Criteria
2016	Critically Endangered	A2cd
2015	Critically Endangered	A2cd
2013	Critically Endangered	A2cd
2012	Critically Endangered	A2cd
2009	Critically Endangered	A2c,d
2008	Critically Endangered
2006	Critically Endangered
2004	Critically Endangered
2000	Critically Endangered
1996	Critically Endangered
1994	Critically Endangered
1988	Not Recognised

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

	Estimate	Data quality
Extent of Occurrence breeding/resident (km2)	31,000	medium
Number of locations	2-5	-
Severely Fragmented		-

	Value	Data quality	Derivation	Year of estimate
No. of mature individuals	1000-2499	good	estimated	2007
Population trend	Decreasing	medium	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	2-100	-	-	-
Percentage in largest subpopulation	1-89	-	-	-
Generation length (yrs)	19	-	-	-

Population justification: There were 752 active nest holes in the Central Panayan Mountain Range in 2007 (E. Curio in litt. 2008). This represents 1,504 mature individuals, and so it is sensible to estimate the mature population to number between 1,000-2,499. This equates to 1,500-3,749 individuals in total, rounded here to 1,500-4,000 individuals.

Trend justification: This species's population is presumed to have decreased extremely rapidly in line with habitat loss, degradation, and hunting within its range over the last three generations. Although conservation measures on Panay have successfully reduced nest poaching, habitat loss and degradation is continuing and declines may continue in the future.

Country/Territory	Occurrence status	Presence	Resident	Breeding	Non-breeding	Passage
Philippines	N	Extant		Yes

Country/Territory	IBA Name
Philippines	North-west Panay peninsula (Pandan)
Philippines	Central Panay mountains
Philippines	Mount Kanla-on Natural Park
Philippines	Southwestern Negros
Philippines	Cuernos de Negros
Philippines	Mount Silay and Mount Mandalagan (Northern Negros)

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Lowland	major	resident
Forest	Subtropical/Tropical Moist Montane	suitable	resident
Altitude	300 - 1200 m	Occasional altitudinal limits

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%)		Slow, Significant Declines		Low Impact: 5
		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 - Intentional use (species is the target)	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Reduced reproductive success, Species mortality
Biological resource use	Hunting & trapping terrestrial animals - Intentional use (species is the target)	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Rapid Declines		Medium Impact: 7
		Stresses Reduced reproductive success, Species mortality
Biological resource use	Logging & wood harvesting - Unintentional effects: (large scale) [harvest]	Timing		Scope		Severity		Impact
		Past, Unlikely to Return		Majority (50-90%)		Rapid Declines		Past Impact
		Stresses Ecosystem degradation, Ecosystem conversion
Biological resource use	Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest]	Timing		Scope		Severity		Impact
		Past, Likely to Return		Majority (50-90%)		Slow, Significant Declines		Past Impact
		Stresses Ecosystem degradation
Biological resource use	Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion
Climate change & severe weather	Storms & flooding	Timing		Scope		Severity		Impact
		Past, Likely to Return		Whole (>90%)		Rapid Declines		Past Impact
		Stresses Ecosystem degradation, Species mortality

Purpose	Primary form used	Life stage used	Source	Scale	Level	Timing
Food - human	-	-			Non-trivial	Recent
Other household goods	-	-			Non-trivial	Recent
Pets/display animals, horticulture	-	-			Non-trivial	Recent

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Recommended citation
BirdLife International (2023) Species factsheet: Rhabdotorrhinus waldeni. Downloaded from http://www.birdlife.org on 02/02/2023. Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 02/02/2023.