Opal-crowned Tanager forages in the canopy (Parker et al. 1996). They hop along tree limbs while using the diagonal lean method for insect foraging (Hilty and Brown 1986, Isler and Isler 1987). At a Ficus tree in southeastern Peru, Tello (2003) observed them feeding on the fruit of the tree from perches and described their fruit handling method as "mash" (ingesting the pulp and juice and dropping the remains).
There are no published data on territorial defense, maintenance, or home range size for Opal-crowned Tanager. At one site in southeastern Peru, the density of these tanagers was estimated at 2 individuals/100 ha (Terborgh et al. 1990).
Undescribed; presumably Opal-crowned Tanager is at least socially monogamous.
Social and interspecific behavior
Opal-crowned Tanagers generally are seen singly or sometimes in groups of two or three; less commonly, they have been observed to be in groups of up to seven individuals (Isler and Isler 1987). They also regularly join mixed species flocks (Isler and Isler 1987). Munn (1985) observed Opal-crowned Tanagers in temporary flocks with other species of Tangara and Dacnis in Amazonian Peru. In these temporary groups, Paradise Tanager (Tangara chilensis) generally was the leading species with any combination of local Tangara and Dacnis species, often including two to eight individuals of Opal-crowned Tanager. These groups were nonpermanent and sometimes joined the permanent canopy flocks in the area for short feeding bouts (Munn 1985).
There are no reports of predation on Opal-crowned Tanager?