Duo the Owl ... mascot was born in 1000 BC, Duo actually debuted in 2011, the year the app launched, according to Apple Developer. But Duo looked different then. The original Duolingo logo ...

Duolingo's iconic mascot, known for his silly antics ... 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 ...