Data Zone
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.
| Critically Endangered | Endangered | Vulnerable |
|---|---|---|
| - | - | - |
| 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 |
| Migratory status | not a migrant | Forest dependency | medium |
| Land-mass type | Average mass | 7 g |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence (breeding/resident) | 737,000 km2 | medium |
| Severely fragmented? | no | - |
| 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 | 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 |
| 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 |
| 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 23/11/2024.
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.