White-bellied Pygmy-tyrant (Myiornis albiventris)

White-bellied Pygmy-tyrant Myiornis albiventris

Current view: Data table and detailed info

Taxonomy

Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A., Fishpool, L.D.C., Boesman, P. and Kirwan, G.M. 2016. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2: Passerines. Lynx Edicions and 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.

IUCN Red List criteria met and history

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2023	Least Concern
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)	551,000 km²	medium
Severely fragmented?	no	-

Population

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	-	-	-
Population trend	decreasing	-	suspected	2017-2027
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	2.27 years	-	-	-
Number of subpopulations	2-100	-	-	-
Percentage of mature individuals in largest subpopulation	1-89%	-	-	-

Population justification: The global population size has not been quantified, but this species is described as uncommon to fairly common (Stotz et al. 1996, Clock 2020).

Trend justification: The population trend has not been investigated, but the only threat known to the species is the logging and fragmentation of forests within the range. Tree cover within the range has been lost at a rate of 7% over ten years (Global Forest Watch 2023, using Hansen et al. [2013] data and methods disclosed therein). The species is forest dependent, and therefore population declines may exceed the rate of tree cover loss due to additional impacts of habitat degradation. Precautionarily, population declines are here placed in the band 10-19% over ten years.

Country/territory distribution

Country/Territory	Presence	Origin	Resident
Bolivia	extant	native	yes
Ecuador	extant	native	yes
Peru	extant	native	yes

Important Bird and Biodiversity Areas (IBA)

Country/Territory	IBA Name
Bolivia	Yungas Inferiores de Madidi
Bolivia	Yungas Superiores de Apolobamba
Bolivia	Yungas Superiores de Mosetenes y Cocapata
Peru	Cordillera Yanachaga

Habitats & altitude

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Lowland	major	resident
Forest	Subtropical/Tropical Moist Montane	major	resident
Altitude	350 - 1200 m	Occasional altitudinal limits

Recommended citation
BirdLife International (2024) Species factsheet: White-bellied Pygmy-tyrant Myiornis albiventris. Downloaded from https://datazone.birdlife.org/species/factsheet/white-bellied-pygmy-tyrant-myiornis-albiventris 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.