Duo the Owl was known for his silly antics, reminding Duolingo users to complete their daily lessons. He debuted with the app in 2011.

Duolingo’s green bird is no more. The company announced on Tuesday that Duo the Owl is ‘dead’ and ‘authorities’ are ‘investigating’. Soon, the internet was flooded with memes mourning the death of the cute but annoying mascot.

Duolingo's owl mascot is dead, and the company seems to be desperately looking for the culprit. The company has been posting on all its social media accounts dropping hints on what caused the Owl's death.