Cinnamon Tanager is typically only found singly or in pairs (Isler and Isler 1987) and generally does not associate with mixed flocks (Ridgely and Tudor 1989, 2009). It often perches out in the open from the tops of trees where it both sings and observes (Isler and Isler 1987). While eating, Cinnamon Tanager has been reported to consume the entire fruit (Allenspach et al. 2012), and Francisco and Galetti (2002) reported three instances of picking behavior and seven instances of reaching behavior as opposed to hanging, hovering, or stalling. However, it has also been reported that Cinnamon Tanagers also consume large fruit pieces while leaving exposed seeds still attached to the branches (Manhaes 2003).
Cinnamon Tanager is reported as territorial. Domingues and Rodrigues (2007) observed two separate groups of Cinnamon Tanagers that had previously established territories. Throughout their nonbreeding season (February-May) a single instance of conflict was observed at the edge of their established territories. Lack of greater levels of conflict was likely the result of the two groups having long established territories or stable neighborhoods (Domingues and Rodrigues 2007).
Not described, probably at least socially monogamous.
Social and interspecific behavior
Cinnamon Tanagers typically are seen singly or in pairs (Isler and Isler 1987). They generally do not associate with mixed flocks (Ridgely and Tudor 1989, 2009).