Learning language app Duolingo posted to social media that its mascot, The Duolingo Owl, has passed away. "It is with heavy hearts that we inform you that Duo, formally known as The Duolingo Owl, is dead," the post on Instagram reads. "We appreciate you respecting Dua Lipa's privacy at this time."

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?