Tiaris olivaceus 


Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Aves Passeriformes Emberizidae

Scientific Name: Tiaris olivaceus
Species Authority: (Linnaeus, 1766)
Common Name(s):
English Yellow-faced Grassquit
Tiaris olivacea Stotz et al. (1996)
Tiaris olivacea Sibley and Monroe (1990, 1993)
Tiaris olivacea BirdLife International (2004)
Taxonomic Source(s): SACC. 2006. A classification of the bird species of South America. Available at: #
Taxonomic Notes: Gender agreement of species name follows David and Gosselin (2002b).

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2012
Date Assessed: 2012-05-01
Assessor(s): BirdLife International
Reviewer(s): Butchart, S. & Symes, A.
Facilitator/Compiler(s): Ekstrom, J., Butchart, S.
This species has a very large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population trend appears to be increasing, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size is very large, and hence does not approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.
Previously published Red List assessments:
2009 Least Concern (LC)
2008 Least Concern (LC)
2004 Least Concern (LC)
2000 Lower Risk/least concern (LR/lc)
1994 Lower Risk/least concern (LR/lc)
1988 Lower Risk/least concern (LR/lc)

Geographic Range [top]

Countries occurrence:
Bahamas; Belize; Cayman Islands; Colombia; Costa Rica; Cuba; Dominican Republic; Ecuador; El Salvador; Guatemala; Haiti; Honduras; Jamaica; Mexico; Nicaragua; Panama; Puerto Rico; Turks and Caicos Islands; United States; United States Minor Outlying Islands; Venezuela, Bolivarian Republic of
Continuing decline in area of occupancy (AOO): Unknown
Extreme fluctuations in area of occupancy (AOO): No
Estimated extent of occurrence (EOO) - km2: 966000
Continuing decline in extent of occurrence (EOO): Unknown
Extreme fluctuations in extent of occurrence (EOO): No
Continuing decline in number of locations: Unknown
Extreme fluctuations in the number of locations: No
Upper elevation limit (metres): 2300
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: 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.
Current Population Trend: Increasing
Additional data:
Continuing decline of mature individuals: Unknown
Extreme fluctuations: No Population severely fragmented: No
Continuing decline in subpopulations: Unknown
Extreme fluctuations in subpopulations: No All individuals in one subpopulation: No

Habitat and Ecology [top]

Citation: BirdLife International. 2012. Tiaris olivaceus. The IUCN Red List of Threatened Species 2012: e.T22723603A39963254. . Downloaded on 30 November 2015.
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