Duolingo’s iconic green owl has met an untimely demise, and fans can’t stop making memes and many a hit tweets about it.

Duo, the Duolingo owl, is dead. But the response and memes on social media suggest that maybe the internet is, too.

The Internet has gone visual. With the world moving at the speed of a tweet, getting your message out there can be tough—especially if you're only using words. Images overlaid with text—often called ...