• 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
-	-	A3cd+4cd

Red List history

Year	Category	Criteria
2021	Vulnerable	A3cd+4cd
2016	Vulnerable	B1ab(i,ii,iii,iv,v);C2a(i);D1
2012	Vulnerable	B1ab(i,ii,iii,iv,v);C2a(i);D1
2008	Vulnerable	B1a+b(i,ii,iii,iv,v); C2a(i)
2004	Vulnerable
2000	Endangered
1996	Vulnerable
1994	Vulnerable
1988	Threatened

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

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	1,310,000 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	1000-15000 mature individuals	poor	suspected	2021
Population trend	decreasing	poor	inferred	2016-2039
Rate of change over the past 10 years/3 generations (longer of the two periods)	15-25%	-	-	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	20-38%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	18-36%	-	-	-
Generation length	7.68 years	-	-	-
Number of subpopulations	3	-	-	-
Percentage of mature individuals in largest subpopulation	1-89%	-	-	-

Population justification: The species has been considered rare and in general there are few visual records, with records made most frequently in the Pantanal and in the Cantão State Park, Tocantins (Dornas and Pinheiro 2018). In Cantão State Park, an average abundance of 0.12 - 0.38 individuals per kilometre of river was estimated (Dornas and Pinheiro 2007). In the Paranã river valley on the border of Goiás and Tocantins, a relative abundance of c.40 individuals per 100 hours of sampling was calculated (Pacheco and Olmos 2006).

The population size has not been estimated directly. Based on a population density of 0.12 - 0.38 individuals per km², an estimated area of forest habitat with at least 50% canopy cover of 143,600 km² in 2020 (Global Forest Watch 2021), and assuming 10-40% of habitat within its mapped range is occupied, the population size is tentatively suspected to be within the range 1,723-21,827 individuals. This is assumed to roughly equate to 1,149-14,551 mature individuals, here rounded to 1,000 - 15,000 mature individuals.

The Brazilian Red List considers that the species has three subpopulations (Dornas and Pinheiro 2018).

Trend justification: Over 19 years from 2000-2019, approximately 17% of tree cover with at least 50% canopy cover was lost within the species's range (Global Forest Watch 2021). Extrapolating this rate over three generations (23.04 years), an estimated 20% of tree cover was lost from the species's range over the past three generations. The species's population size may not be proportionate to tree cover, especially as it is found frequently in gallery or seasonally flooded forests, which may be less affected by deforestation than dry forests. However, the species's population size may be additionally impacted by hunting. Overall, the population size is suspected to have undergone a reduction within the range of 15-25% over the past three generations.

Over four years from 2016-2019, approximately 5.4% of tree cover with at least 50% canopy cover was lost within the species's range (Global Forest Watch 2021). Assuming that the drivers of deforestation are stable, and extrapolating this rate over three generations (23.04 years), it is projected that up to 31% of tree cover may be lost from the species's range over three generations from 2016, and up to 33% may be lost over three generations from 2021. The population size is therefore suspected to undergo reductions of 18-36% over three generations from 2016, and 20-38% over three generations from 2021.

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

Country/Territory	IBA Name
Brazil	Interflúvio dos Rios das Mortes e Araguaia
Brazil	Interflúvio dos Rios Tocantins e Paranã
Brazil	Matas Ciliares do Rio do Coco e Afluentes
Brazil	Parque Estadual do Cantão
Brazil	Reserva Particular do Patrimônio Natural SESC Pantanal e Entorno

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Dry	suitable	resident
Forest	Subtropical/Tropical Moist Lowland	major	resident
Forest	Subtropical/Tropical Swamp	major	resident
Savanna	Dry	suitable	resident
Altitude		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		Majority (50-90%)		Rapid Declines		Medium Impact: 7
		Stresses Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture	Annual & perennial non-timber crops - Small-holder farming	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture	Livestock farming & ranching - Agro-industry grazing, ranching or farming	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Rapid Declines		Medium Impact: 7
		Stresses Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture	Livestock farming & ranching - Small-holder grazing, ranching or farming	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture	Wood & pulp plantations - Agro-industry plantations	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		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 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	Habitat shifting & alteration	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem conversion
Energy production & mining	Renewable energy	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Rapid Declines		Medium Impact: 6
		Stresses Ecosystem degradation, Ecosystem conversion

Purpose	Scale
Food - human	subsistence, national

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Recommended citation
BirdLife International (2024) Species factsheet: Chestnut-bellied Guan Penelope ochrogaster. Downloaded from https://datazone.birdlife.org/species/factsheet/chestnut-bellied-guan-penelope-ochrogaster 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.