This guan occurs on the eastern Andean slopes from Bolivia to north-western Argentina. A museum-specimen study describes plumage differences from the related Dusky-legged Guan.
Specimens attributed to bridgesi in the 2018 study had chestnut upperparts contrasting with a black head, uniform underparts slightly paler than the back, and broad white margins on the wing coverts.
Yungas Guans eat leaves, flowers and fruit in forests of Bolivia and Argentina.
A2016–2018 dry-season survey used233 camera-trap locations in Argentina’s Salta and Jujuy provinces, including protected and private forests.
Habitat use increased near rivers and streams, supporting the importance of riparian forests during the sampled dry season.
Argentina national bird conservation assessment · Vulnerable · Argentina
Argentina’s national-parks biodiversity system reports the2017 national assessment as Vulnerable. Dry-season habitat research highlights river forests as a conservation focus.