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Difference between revisions of "Yellow-faced Grassquit" - BirdForum Opus

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(Picture of nominate. References updated)
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;Tiaris olivacea
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[[Image:Yellow-faced-Grassquit-4V0A5325-Punta-Cana.jpg|thumb|550px|right|Male, nominate subspecies<br />Photo by {{user|fishercl|fishercl}}<br />Punta Cana, [[Dominican Republic]], May 2011]]
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[[Image:Yellow-faced_Grassquit.jpg|thumb|350px|right|Photo by luis jelenszky]]
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;[[:Category:Tiaris|Tiaris]] olivaceus
 
==Identification==
 
==Identification==
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Photographed: El Valle, Panama.
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Length: 10.0-10.7 cm; weight: 9.5-10.0 g<br/>
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*Conical bill, sharper than that of the related seedeaters<br />
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'''Adult male'''
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*Olive-green back
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*Black face and breast
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*Bright yellow throat, [[Topography#Heads|supercilium]], and lower eyelid spot
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*Greyish-olive underparts<br />
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[[Image:Yellow-faced_Grassquitcb.jpg|thumb|350px|right|Subspecies ''pusillus''<br />Photo by {{user|COLOMBIA+Birding|COLOMBIA birding}}<br />West Andes, [[Colombia]], November 2010]]
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'''Adult female'''
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*Dull olive-green upperparts
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*Paler grey underparts
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*Dark breast smudges may be visible
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*The face pattern is much weaker and duller, and may be almost invisible<br />
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'''Young birds''': duller and greyer than the female<br />
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'''Young males''': begin to acquire full adult plumage in their first year.
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==Distribution==
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[[Central America|Central]] and [[South America]] and the [[Caribbean]]<br />
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'''Central America''': [[Mexico]], [[Guatemala]], [[El Salvador]], [[Honduras]], [[Nicaragua]], [[Costa Rica]], [[Panama]], uas
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'''Caribbean (West Indies)''': [[Greater Antilles]], [[Cuba]], [[Cayman Islands]], [[Jamaica]], [[Hispaniola]], [[Haiti]], [[Dominican Republic]] and [[Puerto Rico]]<br >
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'''South America''': [[Colombia]], [[Venezuela]] and [[Ecuador]]
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[[Image:Yellow-faced Grassquit female.jpg|thumb|350px|right|Female, Subspecies ''pusillus''<br />Photo by
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{{user|Stanley+Jones|Stanley Jones}}<br />Road to Rincon de la Vieja towards Dos Rios, Guanacaste Province, [[Costa Rica]], November 2011]]
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==Taxonomy==
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====Subspecies====
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There are 5 subspecies<sup>[[#References|[1]]]</sup>:
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*''T. o. pusillus'':
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:*Gulf lowlands of eastern [[Mexico]] to [[Colombia]] and western [[Venezuela]]
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*''T. o. intermedius'':
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:*Cozumel Island and Holbox Island (off Yucatan Peninsula)
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[[Image:Yellow-faced Grasquit Costa Rica .jpg|thumb|300px|right|Male, Subspecies ''pusillus''<br />Photo by by {{user|Stanley+Jones|Stanley Jones}} <br />[[Alajuela Province]], [[Costa Rica]], March,  2006]]
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*''T. o. ravidus'':
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:*Isla Coiba ([[Panama]])
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*''T. o. olivaceus'':
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:*[[Cuba]], [[Isle of Pines]], [[Jamaica]] and [[Cayman Islands]]
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*''T. o. bryanti'':
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:*[[Puerto Rico]]
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The scientific name has been spelled ''olivacea'' in the past.
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==Habitat==
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Rain forest, open grassy areas, woodlands and grassland. Observed at heights around 275 meters.
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==Behaviour==
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====Diet====
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They feed mainly on seeds (mostly grass), berries and some insects.
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====Breeding====
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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.
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====Vocalisation====
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'''Call''': a weak buzzing trilled ''ttttt-tee''<br />
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The male vibrates his wings as he sings to the female from only a few centimetres away.
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==References==
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#{{Ref-Clements6thAug15}}#Avibase
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#everything.explained
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{{ref}}
 
==External Links==
 
==External Links==
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*[http://www.birdforum.net/pp_gallery/showgallery.php?si=Tiaris+olivacea&x=12&y=7&perpage=24&sort=1&cat=all&ppuser=&friendemail=email%40yourfriend.com&password= View more images of Yellow-faced Grassquit in the gallery]
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{{GSearch|Tiaris+olivace}}
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[[Category:Birds]]
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[[Category:Birds]][[Category:Tiaris]]

Revision as of 20:50, 7 October 2015

Male, nominate subspecies
Photo by fishercl
Punta Cana, Dominican Republic, May 2011
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
Subspecies pusillus
Photo by COLOMBIA birding
West Andes, Colombia, November 2010

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

Female, Subspecies pusillus
Photo by Stanley Jones
Road to Rincon de la Vieja towards Dos Rios, Guanacaste Province, Costa Rica, November 2011

Taxonomy

Subspecies

There are 5 subspecies[1]:

  • T. o. pusillus:
  • T. o. intermedius:
  • Cozumel Island and Holbox Island (off Yucatan Peninsula)
Male, Subspecies pusillus
Photo by by Stanley Jones
Alajuela Province, Costa Rica, March, 2006
  • T. o. ravidus:
  • 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

  1. Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2015. The eBird/Clements checklist of birds of the world: v2015, with updates to August 2015. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/
  2. Avibase
  3. everything.explained

Recommended Citation

External Links

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