The green owl who was the logo of language-learning app Duolingo is no longer. The US company behind the app, which became a ...

Duo the Owl was known for his silly antics, reminding Duolingo users to complete their daily lessons. He debuted with the app ...

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 owl body and two wide eyes that ...