It occurs at low levels in forest and woodland, especially, but not exclusively, humid.
The Thamnophilus ambiguus is classified as Least Concern. Does not qualify for a more at risk category. Widespread and abundant taxa are included in this category.
Thamnophilus ambiguus is endemic to southeast Brazil, occurring mainly near the coast but also extending inland in southeast (Isler et al., 1997) and northeast (M. Marini, unpublished data) of Minas Gerais State. This species can be found from southern Sergipe to Rio de Janeiro. Thamnophilus ambiguus occupies the under- and mid-story of lowland evergreen forest edge, woodland growing in coastal belt, and second growth near woodland to 700 m a.s.l. (Zimmer and Isler, 2003). More