The chestnut-backed tanager (''Stilpnia preciosa'') 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

Thraupidae The tanagers (singular ) comprise the bird family Thraupidae, in the order Passeriformes. The family has a Neotropical distribution and is the second-largest family of birds. It represents about 4% of all avian species and 12% of the Neotropica ...

. It is found in southern

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 ...

, 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 ...

, 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

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 closely related to the rarer black-backed tanager, and females of the two species are indistinguishable. This bird is characterized by its green breast, and chestnut colored back. Before research was completed, this animal was often mistaken for a result of a mutated black-backed tanager (''Stilpnia peruviana''). It is now known that this is not the case, and though the two species are related, they are not in fact the same species. The tanager is not in any danger, and is plentiful in the areas that it resides in. Further studies show that this animal is non-invasive, which simply means that it will not invade areas other than its own region.

References

http://neotropical.birds.cornell.edu/portal/species/overview?p_p_spp=607596 http://www.birdlife.org/datazone/speciesfactsheet.php?id=9410 chestnut-backed tanager Birds of Argentina Birds of the Selva Misionera Birds of the Atlantic Forest Birds of the South Region Birds of Paraguay Birds of Uruguay chestnut-backed tanager Taxonomy articles created by Polbot Taxobox binomials not recognized by IUCN {{Thraupidae-stub