This tiny bird is rare, poorly known, and has proved difficult to classify. In plumage, it resembles the Ruddy-tailed Flycatcher (Terenotriccus erythrurus), and recently published anatomical evidence suggests that Neopipo is also a tyrannid, and most closely related to Terenotriccus. However, compared to the latter species, Cinnamon Manakin-Tyrant retains a more manakin-like demeanor due to its large eyes, rounder head shape and shorter tail. Ruddy-tailed Flycatcher has fleshy pink legs whereas Cinnamon Tyrant-Manakin’s are bluish-grey. Neopipo’s yellow coronal patch, a feature always difficult to discern, will clinch the identification if seen. The Cinnamon Tyrant-Manakin is principally Amazonian in distribution, being usually found in terra firme forest below 1000 m elevation. To some extent it is unclear whether this species is genuinely rare, or whether it is regularly overlooked.