• 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.
SACC. 2005 and updates. A classification of the bird species of South America. Available at: https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2023	Least Concern
2016	Near Threatened	A3c
2012	Near Threatened	A3c
2009	Least Concern
2008	Least Concern
2004	Least Concern
2000	Lower Risk/Least Concern
1994	Lower Risk/Least Concern
1988	Lower Risk/Least Concern

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

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	1,700,000 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	180000-1480000 mature individuals	poor	inferred	2022
Population trend	decreasing	-	suspected	2010-2036
Rate of change over the past 10 years/3 generations (longer of the two periods)	10-19%	-	-	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	10-19%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	10-19%	-	-	-
Generation length	8.54 years	-	-	-
Number of subpopulations	1	-	-	-
Percentage of mature individuals in largest subpopulation	100%	-	-	-

Population justification: The global population size has not been quantified, but this species is described as uncommon to locally common (Stotz et al. 1996, del Hoyo and Kirwan 2020). Other Mitu species occur at a density of 1.1-8.9 individuals/km² (Santini et al. 2018). Assuming that this species occurs at a similar density, and further assuming that only 25% of forests within the range are occupied to account for its strict habitat requirements (i.e. 250,000 km²; Global Forest Watch 2022), the global population may number 275,000-2,225,000 individuals. This roughly equates to 180,000-1,480,000 mature individuals.

Trend justification: The species is suspected to be in decline as a consequence of habitat loss and hunting pressure. Throughout the range, about 4% of tree cover is lost over three generations (25.6 years; Global Forest Watch 2022, using Hansen et al. [2013] data and methods disclosed therein). As the species is strictly dependent on riverine and flooded forest (del Hoyo and Kirwan 2020), population declines caused by habitat loss and degradation may be steeper than the rate of tree cover loss suggests. The impact of hunting has not been quantified. Tentatively, population declines are here placed in the band 10-19% over three generations.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Brazil	extant	native	yes
Colombia	extant	native	yes
Guyana	extant	native	yes
Venezuela	extant	native	yes

Country/Territory	IBA Name
Brazil	Tepuis do Amazonas
Colombia	Bojonawi
Colombia	Chaviripa-El Rubí
Colombia	El Encanto de Guanapalo
Colombia	Estación Biológica Mosiro-Itajura
Colombia	Hato El Sinai
Colombia	La Aurora
Colombia	Parque Nacional Natural Chiribiquete
Colombia	Parque Nacional Natural Sierra de la Macarena
Colombia	Reserva Fundo Raudal de Flor Amarillo
Colombia	Reserva Natural Puerto Rico & La Polonia
Colombia	Reservas de la vereda Altagracia
Colombia	Riberas de la Cuenca Baja del Río Inírida
Colombia	Taparas
Venezuela	Campamento Junglaven
Venezuela	Monumento Natural Tepui Guaiquinima
Venezuela	Parque Nacional Duida-Marahuaca
Venezuela	Parque Nacional Serranía La Neblina
Venezuela	Reserva Forestal Sipapo
Venezuela	Yapacana National Park
Venezuela	Yavita-Pimichin

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Lowland	major	resident
Forest	Subtropical/Tropical Swamp	suitable	resident
Altitude	0 - 600 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
Agriculture & aquaculture	Livestock farming & ranching - Agro-industry grazing, ranching or farming	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture	Livestock farming & ranching - Small-holder grazing, ranching or 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		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Species mortality
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

Purpose	Scale
Food - human	subsistence, national

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Recommended citation
BirdLife International (2024) Species factsheet: Crestless Curassow Mitu tomentosum. Downloaded from https://datazone.birdlife.org/species/factsheet/crestless-curassow-mitu-tomentosum on 23/11/2024.
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 23/11/2024.