Tangara heinei -young male- (Black-capped Tanager)
This is a very exceptional sight. A young Tangara heinei changing its colours from yellow-green (as the females and juveniles), to blue as the adult males.
Black-capped Tanagers are vividly-colored tropical birds that occur in Colombia, Venezuela, Ecuador and Peru. They often occur in pairs foraging in bushes and trees for insects and fruit.
It is one of the few species in the genus that shows obvious sexual dichromatism, with males primarily gray-blue in color with a distinctive black cap, and females yellow-green without a black cap.