Duo is apparently now dead. "It is with heavy hearts that we inform you that Duo, formally known as The Duolingo Owl, is dead," said a post on Instagram. "Authorities are currently investigating his cause of death and we are cooperating fully.

Duo was fatally hit by a Tesla Cybertruck, the language-learning company announced this week. The snarky owl has been the face of Duolingo for over a decade. Why his sudden demise, and what's next?