Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Yungas Antwren or Ashy Antwren (Myrmotherula grisea) is a bird species in the family Thamnophilidae and is endemic to Bolivia. Its natural habitats are subtropical or tropical dry forests and subtropical or tropical moist montane forests. It is becoming rare due to habitat loss. It was formerly classified as a Vulnerable species by the IUCN. But new research has shown it to be not as rare as it was believed. Consequently, it is downlisted to Near Threatened status in 2008. The antbirds are a large family, Thamnophilidae, of passerine birds found across subtropical and tropical Central and South America, from Mexico to Argentina. There are more than 200 species, known variously as antshrikes, antwrens, antvireos, fire-eyes, bare-eyes and bushbirds. They are related to the antthrushes and antpittas (family Formicariidae), the tapaculos, the gnateaters and the ovenbirds.

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