Straneck's tyrannulet (''Serpophaga griseicapilla''), also known as the monte tyrannulet and grey-crowned tyrannulet, is a small species of

bird Birds are a group of warm-blooded vertebrates constituting the class Aves (), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweigh ...

in the family Tyrannidae. It is found in woodland and open habitats with scatted bushes and trees in south-central

South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere at the northern tip of the continent. It can also be described as the southe ...

, but the details are still unclear. It breeds in

Argentina Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an area of , making it the second-largest country in South America after Brazil, th ...

, but may also breed in

Bolivia , image_flag = Bandera de Bolivia (Estado).svg , flag_alt = Horizontal tricolor (red, yellow, and green from top to bottom) with the coat of arms of Bolivia in the center , flag_alt2 = 7 × 7 square p ...

. In addition to these countries, it has been recorded as a non-breeding visitor in

Paraguay Paraguay (; ), officially the Republic of Paraguay ( es, República del Paraguay, links=no; gn, Tavakuairetã Paraguái, links=si), is a landlocked country in South America. It is bordered by Argentina to the south and southwest, Brazil to th ...

, and possibly

Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...

and

Uruguay Uruguay (; ), officially the Oriental Republic of Uruguay ( es, República Oriental del Uruguay), is a country in South America. It shares borders with Argentina to its west and southwest and Brazil to its north and northeast; while bordering ...

(it is unclear if it is a regular non-breeding visitor or only an accidental visitor to the last two countries). Visually it closely resembles the white-crested tyrannulet, but its voice is distinctive and its tail shorter. Considerable

taxonomic Taxonomy is the practice and science of categorization or classification. A taxonomy (or taxonomical classification) is a scheme of classification, especially a hierarchical classification, in which things are organized into groups or types. ...

confusion has surrounded this species, which for a period mistakenly was referred to by the scientific name ''Serpophaga griseiceps'', a

junior synonym The Botanical and Zoological Codes of nomenclature treat the concept of synonymy differently. * In botanical nomenclature, a synonym is a scientific name that applies to a taxon that (now) goes by a different scientific name. For example, Linna ...

of '' Serpophaga munda''. Consequently, the Straneck's tyrannulet only received its scientific name in 2007 despite having been known since the early 1990s.

References

* Jaramillo, A. (2010)
Recognize the newly described Serpophaga griseicapilla.
' South American Classification Committee. * Straneck, R. (2007). "Una nueva especie de ''Serpophaga'' (Aves Tyrannidae)". ''Revista FAVE - Ciencias Veterinarias'' 6: 1–2.

External links

Photos, videos and observations
at Cornell Lab of Ornithologys Birds of the World
Calls and songs
on the xeno canto collection Straneck's tyrannulet Birds of Argentina Straneck's tyrannulet {{Tyrannidae-stub