The Grey-capped Tyrannulet is a small bird with a gray head, green back, and yellowish flanks. In eastern Brazil's Atlantic Forest highlands, it takes insects from outer tree branches and also eats small fruit.
The head is gray, the back leaf-green, and the flanks yellowish. Its pale underparts contrast with the gray head and green upperparts.
It lives in highland Atlantic Forest in eastern Brazil. It catches insects on outer branches at mid-level and also eats small fruit; it may join mixed-species flocks.
An extinction-risk assessment has not been added yet.