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
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 8.5 g
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 5,570,000 medium
Number of locations -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals poor estimated 2009
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 - - -
Largest subpopulations - - -
Generation length (yrs) 3.4 - - -

Population justification: Partners in Flight estimate the total population to number 500,000-4,999,999 individuals (A. Panjabi in litt. 2008).

Trend justification: The population is suspected to be increasing as ongoing habitat degradation is creating new areas of suitable habitat.


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Bahamas N 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
Turks and Caicos Islands (to UK) N Extant Yes
United States Minor Outlying Islands (to USA) N Extant Yes
USA N Extant Yes
Venezuela N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Mexico Chimalapas
Mexico Corredor Calakmul-Sian Ka'an
Mexico Corredor Central Vallarta-Punta Laguna
Mexico El Ocote
Mexico Isla Cozumel
Mexico Lagoon of Términos
Mexico Los Petenes
Mexico Los Tuxtlas
Mexico Montes Azules
Mexico Ría Celestún
Mexico Ría Lagartos
Mexico Sian Ka'an
Mexico Sierra Anover
Mexico Sierra Chixtontic-Sierra Canjá
Mexico Sierra de Tabasco
Mexico Sierra de Ticúl-Punto Put
Mexico Uxpanapa
Mexico Uyumil Ce'h
Mexico Yum-balam

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 Whole Adults and juveniles Wild International Non-trivial Recent
Pets/display animals, horticulture - - International Non-trivial Recent

Recommended citation
BirdLife International (2019) Species factsheet: Tiaris olivaceus. Downloaded from http://www.birdlife.org on 20/03/2019. Recommended citation for factsheets for more than one species: BirdLife International (2019) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 20/03/2019.