A 2016 taxonomic reassessment separated two Brazilian forms previously grouped together as Yellow-legged Tinamou: Crypturellus noctivagus and C. zabele. This entry follows the Atlantic Forest form, C. noctivagus. A 2019 distribution study used the broader earlier concept, so its map should not be read as the range of C. noctivagus alone under the later treatment.
The 2016 diagnosis describes the upper breast of both sexes of the Atlantic Forest C. noctivagus as plain gray. In C. zabele, which that paper treated as a separate Caatinga species, females have bars across the same area.
A 2019 Brazil distribution study described its broader C. noctivagus subject as a terrestrial forest bird and compiled records from 114 municipalities. After the 2016 taxonomic revision, those records cannot all be assigned to C. noctivagus alone.
An extinction-risk assessment has not been added yet.