Behavior

Violaceous Euphonia forages at all heights; Snow and Snow (1971) reported that on Trinidad, roughly half of their observations of foraging were above 6 m, and half below. Hilty (2003), however, describes it as "generally" foraging "fairly high."  It will often cling with the head pointed down, or even with the body upside down, when taking epiphytic fruit (Snow and Snow 1971); will also take some species of fruit, such as of Rhipsalis, while hovering briefly (Snow and Snow 1971). It "chews" some fruit whole, ingesting the pulp and seeds and dropping the skin, but pecks pieces out of fruit that are too large to swallow whole, or crushes fruit to reduce their size prior to swallowing (Snow and Snow 1971).

In Brazil roosts in "the densest clumps of mistletoe", with several individuals roosting within a single plant (Sick 1983).

There are no published information on territorial defense, maintenance, or fidelity, or on territory or home range size for Violaceous Euphonia.

Violaceous Euphonia is socially monogamous.

Violaceous Euphonia usually forages in pairs or small groups, but also joins aggregations of birds at fruiting trees and associates with mixed species flocks (Lamm 1948, Isler and Isler 1987, Oniki et al. 1994, Hilty 2003).

No published reports are available of predation on Violaceous Euphonia.