Duolingo, the language-learning app, killed off its owl mascot named Duo on Tuesday in what is assuredly some kind of publicity stunt. In fact, here were are writing about it. So, well played ...

The great horned owl is the most common owl of the Americas, easily recognizable because of the feather tufts on its head. These “plumicorns” resemble horns or, to some, catlike ears.