LC
Yellow-faced Grassquit Tiaris olivaceus



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: #http://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
2021 Least Concern
2018 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 Does not normally occur in forest
Land mass type Average mass 8 g
Distribution

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 5,570,000 medium
Number of locations -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals 5000000-50000000 poor suspected 2019
Population trend Increasing suspected -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) - - -
Decline (10 years/3 generation past and future) - - -
Number of subpopulations - - -
Percentage in largest subpopulation - - -

Population justification: The global population is suspected to number 5-50 million mature individuals (Partners in Flight 2019).

Trend justification:

This species is undergoing a large, significant increase (Partners in Flight 2019).


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Bahamas I Extant Yes
Belize N Extant Yes
Cayman Islands (to UK) N Extant Yes
Colombia N Extant Yes
Costa Rica N Extant Yes
Cuba N Extant Yes
Dominican Republic N Extant Yes
Ecuador N Extant Yes
El Salvador N Extant Yes
Guatemala N Extant Yes
Haiti N Extant Yes
Honduras N Extant Yes
Jamaica N Extant Yes
Mexico N Extant Yes
Nicaragua N Extant Yes
Panama N Extant Yes
Puerto Rico (to USA) N Extant Yes
USA V Extant Yes
Venezuela N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Jamaica Yallahs
Jamaica Blue Mountains
Jamaica Mount Diablo
Jamaica Jericho
Jamaica Teak Pen
Jamaica Bull Head
Jamaica Dry Harbour Mountain
Jamaica Fyffe and Rankine
Jamaica Duffus Mountain
Jamaica Hyde Hall Mountain
Jamaica Negril
Jamaica Point Hill
Jamaica Rose Hall
Jamaica Catadupa
Mexico Chimalapas
Mexico Corredor Calakmul - Sian Ka'an
Mexico Corredor Central Vallarta - Punta Laguna
Mexico El Ocote
Mexico Isla Cozumel
Mexico Laguna de Términos
Mexico Los Petenes
Mexico Los Tuxtlas
Mexico Yum Balam
Mexico Montes Azules
Mexico Uxpanapa
Mexico Ría Celestún
Mexico Ría Lagartos
Mexico Sian Ka'an
Mexico Sierra de Zongolica
Mexico Sierra de Ticúl - Punto Put
Mexico Sierra de Tabasco
Mexico Sierra Anover
Mexico Sierra Chixtontic, Sierra Canjá

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Pastureland suitable resident
Artificial/Terrestrial Subtropical/Tropical Heavily Degraded Former Forest suitable resident
Grassland Subtropical/Tropical Dry major resident
Grassland Subtropical/Tropical High Altitude suitable resident
Shrubland Subtropical/Tropical Dry suitable resident
Shrubland Subtropical/Tropical High Altitude suitable resident
Shrubland Subtropical/Tropical Moist major resident
Altitude 0 - 2300 m Occasional altitudinal limits  

Utilisation
Purpose Primary form used Life stage used Source Scale Level Timing
Pets/display animals, horticulture - - International Non-trivial Recent

Recommended citation
BirdLife International (2022) Species factsheet: Tiaris olivaceus. Downloaded from http://www.birdlife.org on 21/05/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 21/05/2022.