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

Taxonomic note
Hierococcyx vagans (del Hoyo and Collar 2014) was previously placed in the genus Cuculus.

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
-	-	-

Red List history

Year	Category	Criteria
2022	Near Threatened	A2c+3c+4c
2016	Near Threatened	A2c+3c+4c
2012	Near Threatened	A2c+3c+4c
2008	Near Threatened	A2c; A3c; A4c
2004	Near Threatened
2000	Lower Risk/Near Threatened
1994	Lower Risk/Least Concern
1988	Lower Risk/Least Concern

Migratory status	not a migrant	Forest dependency	medium
Land-mass type	continent shelf island	Average mass	58 g

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	4,160,000 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	-	-	-
Population trend	decreasing	poor	suspected	2016-2028
Rate of change over the past 10 years/3 generations (longer of the two periods)	20-29%	-	-	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	20-29%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	20-29%	-	-	-
Generation length	4.06 years	-	-	-
Number of subpopulations	3-100	-	-	-
Percentage of mature individuals in largest subpopulation	1-89%	-	-	-

Population justification: The population size of this species has not been quantified, although the species is typically described as uncommon (Wells 1999, Mann 2008, Eaton et al. 2016).

Trend justification: The population is suspected to be declining because of forest loss throughout its range. Over the past three generations (12.2 years; Bird et al. 2020), forest loss in this species' range has been equivalent to 21–23% (Global Forest Watch 2022, using data from Hansen et al. [2013] and methods disclosed therein). Because this rate was similar between 2016 and 2020, with little indication this will slow in the future, the same rate is suspected to occur over the next three generations. As a forest-dependent species, the population is suspected to be declining at a rate broadly similar to the that of forest loss. It may additionally be impacted by habitat degradation and fragmentation.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Brunei	extant	native	yes
Indonesia	extant	native	yes
Laos	extant	native	yes
Malaysia	extant	native	yes
Myanmar	extant	native	yes
Thailand	extant	native	yes

Country/Territory	IBA Name
Indonesia	Sangkulirang
Malaysia	Belum-Temenggor
Malaysia	Bintang Range
Malaysia	Central Titiwangsa Range
Malaysia	Danum Valley Conservation Area
Malaysia	Endau-Rompin
Malaysia	Kabili-Sepilok
Malaysia	Kinabatangan floodplain
Malaysia	Kledang Range
Malaysia	Krau Wildlife Reserve
Malaysia	Lambir Hills National Park
Malaysia	Lanjak Entimau Wildlife Sanctuary
Malaysia	Maliau Basin Conservation Area
Malaysia	Mount Kinabalu
Malaysia	Mulu - Buda Protected Area
Malaysia	Nakawan Range
Malaysia	Niah National Park
Malaysia	Panti forest
Malaysia	Pondok Tanjung Forest Reserve
Malaysia	Selangor Heritage Park
Malaysia	South-east Pahang peat swamp forest
Malaysia	Tabin Wildlife Reserve
Malaysia	Taman Negara National Park
Malaysia	Tanjung Tuan
Malaysia	Ulu Muda
Thailand	Bala Sector, Hala-Bala Wildlife Sanctuary
Thailand	Hala Sector, Hala-Bala Wildlife Sanctuary and Bang Lang National Park
Thailand	Kaeng Krachan
Thailand	Khao Luang
Thailand	Khao Nor Chuchi
Thailand	Thaleban

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Artificial/Terrestrial	Subtropical/Tropical Heavily Degraded Former Forest	suitable	non-breeding
Forest	Subtropical/Tropical Moist Lowland	major	non-breeding
Forest	Subtropical/Tropical Moist Lowland	major	breeding
Altitude	0 - 900 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	Wood & pulp plantations - Agro-industry plantations	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion
Biological resource use	Logging & wood harvesting - Unintentional effects: (large scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		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
Natural system modifications	Fire & fire suppression - Increase in fire frequency/intensity	Timing		Scope		Severity		Impact
		Past, Likely to Return		Minority (<50%)		Slow, Significant Declines		Past Impact
		Stresses Ecosystem degradation, Ecosystem conversion

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Recommended citation
BirdLife International (2024) Species factsheet: Moustached Hawk-Cuckoo Hierococcyx vagans. Downloaded from https://datazone.birdlife.org/species/factsheet/moustached-hawk-cuckoo-hierococcyx-vagans on 23/12/2024.
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 23/12/2024.