As evening looms it takes to the air to battle with the other males in hope of getting a date.' Researchers think the dark owl eyes on its wings are a case of camouflage, warding off predators by ...

But Duo looked different then. The original Duolingo logo featured a 2-D owl whose eyes and mouth spelled out “DUO.” A year later, the first 3-D version of Duo was released with a realistic ...