The Chaco Serrano ecological region is characterized by semi-humid to fairly dry, deciduous foothill to lower montane forest and woodland on the lower east slope of the southern Andes. It is an ecological transition zone between the humid Southern Yungas and dry Chaco ecological regions.

Recommended eBird Hotspot in the Chaco Serrano:
Refugio Los Volcanes

Bolivian Endemics and Near-Endemics:
Myiopsitta luchsi/Cliff Parakeet
Ara rubrogenys
/Red-fronted Macaw
Thamnophilus sticturus
/Bolivian Slaty-Antshrike
Oreopsar bolivianus
/Bolivian Blackbird

Threatened species:
Crax fasciolata/Bare-faced Curassow
Ara rubrogenys
/Red-fronted Macaw

Other ecoregion specialties:
Chunga burmeisteri/Black-legged Seriema