Why do you think Duo died? Duolingo has killed its mascot in a new marketing stunt, but it's brought out the worst in brands.

Duolingo’s green bird is no more. The company announced on Tuesday that Duo the Owl is ‘dead’ and ‘authorities’ are ...

Duolingo Owl Dies refers to a promotional campaign and viral marketing stunt by the language-learning app Duolingo, which ...