This video says about itself:
Three Dusky-faced Tanagers At Panama Fruit Feeders – Jan 10, 2018
Almost always low in the undergrowth, Dusky-faced Tanagers tend to stay under cover in thick vegetation. They travel in noisy single-species groups, only rarely mixing with other species.
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How does interspecific competition drive diversity? Massive study of >350 tanager species shows strong influence of competition on resource-use traits, but weak on social traits: here.