(Picture of female. Attempt to disguise some copied text. Distribution, Taxonomy. References.) |
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[[Image:Yellow-faced Grasquit Costa Rica .jpg|thumb|550px|right|Photo of male by {{user|Stanley+Jones|Stanley Jones}} <br />[[Alajuela Province]], [[Costa Rica]], March, 2006]] | [[Image:Yellow-faced Grasquit Costa Rica .jpg|thumb|550px|right|Photo of male by {{user|Stanley+Jones|Stanley Jones}} <br />[[Alajuela Province]], [[Costa Rica]], March, 2006]] | ||
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;[[:Category:Tiaris|Tiaris]] olivaceus | ;[[:Category:Tiaris|Tiaris]] olivaceus | ||
==Identification== | ==Identification== | ||
− | Length: 10.0-10.7 cm; weight: 9.5-10.0 g<br/> | + | Length: 10.0-10.7 cm; weight: 9.5-10.0 g<br/> |
− | + | *Conical bill, sharper than that of the related seedeaters<br /> | |
− | + | '''Adult male''' | |
+ | *Olive-green back | ||
+ | *Black face and breast | ||
+ | *Bright yellow throat, [[Topography#Heads|supercilium]], and lower eyelid spot | ||
+ | *Greyish-olive underparts<br /> | ||
+ | '''Adult female''' | ||
+ | *Dull olive-green upperparts | ||
+ | *Paler grey underparts | ||
+ | *Dark breast smudges may be visible | ||
+ | *The face pattern is much weaker and duller, and may be almost invisible<br /> | ||
+ | '''Young birds''': duller and greyer than the female<br /> | ||
+ | '''Young males''': begin to acquire full adult plumage in their first year. | ||
==Distribution== | ==Distribution== | ||
− | + | [[Image:Yellow-faced_Grassquitcb.jpg|thumb|400px|right|Photo by {{user|COLOMBIA+Birding|COLOMBIA birding}}<br />Photo taken: W. Andes ]] | |
+ | [[Central America|Central]] and [[South America]] and the [[Caribbean]]<br /> | ||
+ | '''Central America''': [[Mexico]], [[Guatemala]], [[El Salvador]], [[Honduras]], [[Nicaragua]], [[Costa Rica]], [[Panama]], uas | ||
+ | '''Caribbean (West Indies)''': [[Greater Antilles]], [[Cuba]], [[Cayman Islands]], [[Jamaica]], [[Hispaniola]], [[Haiti]], [[Dominican Republic]] and [[Puerto Rico]]<br > | ||
+ | '''South America''': [[Colombia]], [[Venezuela]] and [[Ecuador]] | ||
+ | ==Taxonomy== | ||
+ | ====Subspecies==== | ||
+ | There are 5 subspecies<sup>[[#References|[1]]]</sup>: | ||
+ | *''T. o. pusillus'': | ||
+ | :*Gulf lowlands of eastern [[Mexico]] to [[Colombia]] and western [[Venezuela]] | ||
+ | *''T. o. intermedius'': | ||
+ | :*Cozumel Island and Holbox Island (off Yucatan Peninsula) | ||
+ | [[Image:Yellow-faced Grassquit female.jpg|thumb|350px|right|Female<br />Photo by | ||
+ | {{user|Stanley+Jones|Stanley Jones}}<br />Road to Rincon de la Vieja towards Dos Rios, Guanacaste Province, [[Costa Rica]], November 2011]] | ||
+ | *''T. o. ravidus'': | ||
+ | :*Isla Coiba ([[Panama]]) | ||
+ | *''T. o. olivaceus'': | ||
+ | :*[[Cuba]], [[Isle of Pines]], [[Jamaica]] and [[Cayman Islands]] | ||
+ | *''T. o. bryanti'': | ||
+ | :*[[Puerto Rico]] | ||
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The scientific name has been spelled ''olivacea'' in the past. | The scientific name has been spelled ''olivacea'' in the past. | ||
==Habitat== | ==Habitat== | ||
− | + | Rain forest, open grassy areas, woodlands and grassland. Observed at heights around 275 meters. | |
==Behaviour== | ==Behaviour== | ||
− | The globular nest, | + | ====Diet==== |
− | + | They feed mainly on seeds (mostly grass), berries and some insects. | |
− | + | ====Breeding==== | |
− | + | The female builds the globular nest, which is formed from stems of grass and weeds. They sometimes nest in loose colonies. The clutch consists of two or three brown-speckled white eggs, which are incubated by the female alone for 12-14 days to hatching. | |
+ | ====Vocalisation==== | ||
+ | '''Call''': a weak buzzing trilled ''ttttt-tee''<br /> | ||
+ | The male vibrates his wings as he sings to the female from only a few centimetres away. | ||
+ | ==References== | ||
+ | #{{Ref-Clements6thAug11}}#Avibase | ||
+ | #everything.explained | ||
+ | {{ref}} | ||
==External Links== | ==External Links== | ||
{{GSearch|Tiaris+olivace}} | {{GSearch|Tiaris+olivace}} | ||
[[Category:Birds]][[Category:Tiaris]] | [[Category:Birds]][[Category:Tiaris]] |
Revision as of 23:23, 24 February 2012
- Tiaris olivaceus
Identification
Length: 10.0-10.7 cm; weight: 9.5-10.0 g
- Conical bill, sharper than that of the related seedeaters
Adult male
- Olive-green back
- Black face and breast
- Bright yellow throat, supercilium, and lower eyelid spot
- Greyish-olive underparts
Adult female
- Dull olive-green upperparts
- Paler grey underparts
- Dark breast smudges may be visible
- The face pattern is much weaker and duller, and may be almost invisible
Young birds: duller and greyer than the female
Young males: begin to acquire full adult plumage in their first year.
Distribution
Central and South America and the Caribbean
Central America: Mexico, Guatemala, El Salvador, Honduras, Nicaragua, Costa Rica, Panama, uas
Caribbean (West Indies): Greater Antilles, Cuba, Cayman Islands, Jamaica, Hispaniola, Haiti, Dominican Republic and Puerto Rico
South America: Colombia, Venezuela and Ecuador
Taxonomy
Subspecies
There are 5 subspecies[1]:
- T. o. pusillus:
- T. o. intermedius:
- Cozumel Island and Holbox Island (off Yucatan Peninsula)
![](/wiki/images/thumb/f/f4/Yellow-faced_Grassquit_female.jpg/350px-Yellow-faced_Grassquit_female.jpg)
Photo by Stanley Jones
Road to Rincon de la Vieja towards Dos Rios, Guanacaste Province, Costa Rica, November 2011
- T. o. ravidus:
- Isla Coiba (Panama)
- T. o. olivaceus:
- T. o. bryanti:
The scientific name has been spelled olivacea in the past.
Habitat
Rain forest, open grassy areas, woodlands and grassland. Observed at heights around 275 meters.
Behaviour
Diet
They feed mainly on seeds (mostly grass), berries and some insects.
Breeding
The female builds the globular nest, which is formed from stems of grass and weeds. They sometimes nest in loose colonies. The clutch consists of two or three brown-speckled white eggs, which are incubated by the female alone for 12-14 days to hatching.
Vocalisation
Call: a weak buzzing trilled ttttt-tee
The male vibrates his wings as he sings to the female from only a few centimetres away.
References
- Clements, JF. 2011. The Clements Checklist of Birds of the World. 6th ed., with updates to August 2011. Ithaca: Cornell Univ. Press. ISBN 978-0801445019. Spreadsheet available at http://www.birds.cornell.edu/clementschecklist/downloadable-clements-checklist
- Avibase
- everything.explained
Recommended Citation
- BirdForum Opus contributors. (2024) Yellow-faced Grassquit. In: BirdForum, the forum for wild birds and birding. Retrieved 16 June 2024 from https://www.birdforum.net/opus/Yellow-faced_Grassquit