The green owl mascot's tendency to guilt-trip users in a passive-aggressive way made him a meme in 2017, and his popularity has soared ever since.

Duo the Owl has mysteriously died, the language-learning platform announced in an unexpected update. On today’s episode of completely unexpected moves in the tech world, the Duolingo owl has mysteriously died.

Language learning app Duolingo revealed this week that the bright green owl that was the face of the company has "died," in a viral social media stunt. Duo, who was known for his menacing reminders to get people to keep up with their lessons on the app,