The planalto tyrannulet (''Phyllomyias fasciatus'') is a 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 widespread in wooded habitats of eastern

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 ...

, extreme north-eastern

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 ...

, eastern

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 far north-eastern

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 ...

. It is generally common (typically the commonest ''

Phyllomyias ''Phyllomyias'' is a genus of small birds in the tyrant-flycatcher family Tyrannidae. They are found in wooded habitats of Central America, Central and South America. Some species are among the commonest birds in their range, while other are rare ...

'' in its range), and consequently rated as

least concern A least-concern species is a species that has been categorized by the International Union for Conservation of Nature (IUCN) as evaluated as not being a focus of species conservation because the specific species is still plentiful in the wild. T ...

BirdLife International BirdLife International is a global partnership of non-governmental organizations that strives to conserve birds and their habitats. BirdLife International's priorities include preventing extinction of bird species, identifying and safeguarding ...

and

IUCN The International Union for Conservation of Nature (IUCN; officially International Union for Conservation of Nature and Natural Resources) is an international organization working in the field of nature conservation and sustainable use of natu ...

. There are three relatively distinctive

subspecies In biological classification, subspecies is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (morphology), but that can successfully interbreed. Not all species ...

, differing in measurements,

plumage Plumage ( "feather") is a layer of feathers that covers a bird and the pattern, colour, and arrangement of those feathers. The pattern and colours of plumage differ between species and subspecies and may vary with age classes. Within species, ...

and voice, and it is possible they are better regarded as separate species.Herzog, Kessler & Balderrama. (2008). ''A new species of tyrannulet (Tyrannidae: Phyllomyias) from Andean foothills in northwest Bolivia and adjacent Peru.'' Auk 125(2): 265-276. It can be separated from other members of its genus found in its range by the combination of a greyish-tinged forecrown and an all-black bill.

References

planalto tyrannulet Birds of Brazil planalto tyrannulet Taxonomy articles created by Polbot {{Tyrannidae-stub