Where is the Blue-gray Tanager observed to be more common than in primary, undisturbed forest?

Answer

Secondary forest resulting from slash-and-burn agriculture followed by abandonment

Studies observing birds in the Brazilian Amazon revealed that the Blue-gray Tanager species is more common in secondary forest resulting from slash-and-burn agriculture followed by abandonment than it is in primary, undisturbed forest.

Where is the Blue-gray Tanager observed to be more common than in primary, undisturbed forest?
birdconservationstatusbluetanager