LC
Yellow-bellied Tyrannulet Ornithion semiflavum



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.

IUCN Red List criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - -

Red List history
Year Category Criteria
2022 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/Least Concern
1988 Lower Risk/Least Concern
Species attributes

Migratory status not a migrant Forest dependency medium
Land-mass type Average mass 7 g
Range

Estimate Data quality
Extent of Occurrence (breeding/resident) 737,000 km2 medium
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size 50000-499999 mature individuals poor suspected 2022
Population trend decreasing - suspected 2016-2026
Rate of change over the past 10 years/3 generations (longer of the two periods) 1-19% - - -
Rate of change over the future 10 years/3 generations (longer of the two periods) 1-19% - - -
Rate of change over the past & future 10 years/3 generations (longer of the two periods) 1-19% - - -
Generation length 2.38 years - - -

Population justification: The global population is suspected to number 50,000-499,999 mature individuals (Partners in Flight 2022).

Trend justification:

The population trend has not been investigated. Tree cover within the range has been lost at a rate of 14% over the past ten years; since 2016 this has been increasing to a rate equivalent to 20% over ten years (Global Forest Watch 2021, using Hansen et al. [2013] data and methods disclosed therein). Apart from forests, the species readily occupies edge, tall second growth, plantations, gardens and scrub (Fitzpatrick 2020); consequently, current deforestation may not be affecting the population at an equal rate. The rate of population decline is therefore here placed in the band 1-19% over ten years.


Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
Belize extant native yes
Costa Rica extant native yes
Guatemala extant native yes
Honduras extant native yes
Mexico extant native yes
Nicaragua extant native yes
Panama extant native yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Belize Belize Coastal and near shore islands
Belize Maya Mountains and southern reserves
Belize Northeastern Belize
Belize Rio Bravo CMA Gallon Jug Estate
Costa Rica Fila Costeña
Costa Rica Pacuare, coastal wetlands and Migratory Bird Corridor
Costa Rica Sierpe Wetlands and Osa Peninsula
Guatemala Candelaria - Campur
Guatemala Guatemalan Caribbean Slope
Guatemala Lachuá - Ik'bolay
Guatemala Maya - Lacandón
Guatemala Rio La Pasion
Guatemala Sacranix
Nicaragua Los Guatuzos
Panama El Chorogo-Palo Blanco

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Plantations suitable resident
Artificial/Terrestrial Rural Gardens suitable resident
Artificial/Terrestrial Subtropical/Tropical Heavily Degraded Former Forest suitable resident
Forest Subtropical/Tropical Moist Lowland suitable resident
Forest Subtropical/Tropical Moist Montane suitable resident
Shrubland Subtropical/Tropical Moist suitable resident
Altitude 0 - 1500 m Occasional altitudinal limits  

Recommended citation
BirdLife International (2024) Species factsheet: Yellow-bellied Tyrannulet Ornithion semiflavum. Downloaded from https://datazone.birdlife.org/species/factsheet/yellow-bellied-tyrannulet-ornithion-semiflavum 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.