The Grey-crowned Tyrannulet (Serpophaga griseicapilla), also known as the Monte Tyrannulet and Straneck's Tyrannulet, is a small species of bird

Bird

Birds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from...

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

South America

South America is a continent situated in the Western Hemisphere, mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere. The continent is also considered a subcontinent of the Americas. It is bordered on the west by the Pacific Ocean and on the north and east...

, but the details are still unclear. It breeds in Argentina

Argentina

Argentina , officially the Argentine Republic , is the second largest country in South America by land area, after Brazil. It is constituted as a federation of 23 provinces and an autonomous city, Buenos Aires...

, but may also breed in Bolivia

Bolivia

Bolivia officially known as Plurinational State of Bolivia , is a landlocked country in central South America. It is the poorest country in South America...

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

Paraguay

Paraguay , officially the Republic of Paraguay , is a landlocked country in South America. It is bordered by Argentina to the south and southwest, Brazil to the east and northeast, and Bolivia to the northwest. Paraguay lies on both banks of the Paraguay River, which runs through the center of the...

, and possibly Brazil

Brazil

Brazil , officially the Federative Republic of Brazil , is the largest country in South America. It is the world's fifth largest country, both by geographical area and by population with over 192 million people...

 and Uruguay

Uruguay

Uruguay ,officially the Oriental Republic of Uruguay,sometimes the Eastern Republic of Uruguay; ) is a country in the southeastern part of South America. It is home to some 3.5 million people, of whom 1.8 million live in the capital Montevideo and its metropolitan area...

 (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

White-crested Tyrannulet

The White-crested Tyrannulet is a small species of bird in the Tyrannidae family. It is found in woodland and open habitats with scatted bushes and trees in Argentina, Bolivia, Brazil, Paraguay, and Uruguay. It is closely related to the White-bellied Tyrannulet, but unlike that species the belly...

, but its voice is distinctive. Considerable taxonomic confusion has surrounded this species, which for a period mistakenly was referred to by the scientific name Serpophaga griseiceps, a junior synonym of Serpophaga munda

White-bellied Tyrannulet

The White-bellied Tyrannulet is a small species of bird in the Tyrannidae family. It is found in Argentina, Bolivia, Brazil, Paraguay, and Uruguay. It is found in open forest, woodland and various open habitats with scattered trees. It is closely related to the White-crested Tyrannulet, but that...

. Consequently, the Grey-crowned Tyrannulet only received its scientific name in 2007 despite having been known since the early 1990s.

External links

• Recordings of Serpophaga griseicapilla. Xeno-canto.