Duo has been known to call in ballistic missile-strikes on people who do not practice,[4] or physically abuse them.[5] The meme has become known as "Evil Duolingo Owl".[6]

The front page of Duolingo push
The official Duolingo YouTube channel posted a video titled "Introducing Duo Push" on April 1st, 2019, as a nod to the "Evil Duo" memes. In the video, a person dressed in Duo costume is shown stalking users who have not completed their daily lessons in order to "push" them toward their goals