Chestnut-headed Nunlet (Nonnula amaurocephala)

Chestnut-headed Nunlet Nonnula amaurocephala

Current view: Data table and detailed info

Taxonomy

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. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
del Hoyo, J.; Collar, N. J.; Christie, D. A.; Elliott, A.; Fishpool, L. D. C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Barcelona, Spain and Cambridge UK: Lynx Edicions and BirdLife International.
SACC. 2006. A classification of the bird species of South America. Available at: https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm.
SACC. 2006. A classification of the bird species of South America. Available at: https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm.

IUCN Red List criteria met and history

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

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

Species attributes

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

Range

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	26,400 km²	medium
Severely fragmented?	no	-

Population

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	-	-	-
Population trend	decreasing	-	suspected	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	1-25%	-	-	-
Generation length	6.3 years	-	-	-

Population justification: This is a poorly known species and no population estimates are available.

Trend justification: This species is suspected to lose 5.8-6.4% of suitable habitat within its distribution over three generations (10 years) based on a model of Amazonian deforestation (Soares-Filho et al. 2006, Bird et al. 2011). It is therefore suspected to decline by <25% over three generations.

Country/territory distribution

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

Important Bird and Biodiversity Areas (IBA)

Country/Territory	IBA Name
Brazil	Parque Nacional do Jaú

Habitats & altitude

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Lowland	marginal	resident
Forest	Subtropical/Tropical Swamp	major	resident
Altitude		Occasional altitudinal limits

Recommended citation
BirdLife International (2024) Species factsheet: Chestnut-headed Nunlet Nonnula amaurocephala. Downloaded from https://datazone.birdlife.org/species/factsheet/chestnut-headed-nunlet-nonnula-amaurocephala 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.