Photo by Wolfgang Kippes
The caption called this a sperlingskauz, which was translated to "Sparrow Owl."
I'd never heard of a Sparrow Owl, but the EPO has a scientific name that is Latin for "Sparrow Owl" that I will assume is how it got its German name.
I took it to mean you can just hoot at them as a way of saying hello ๐ค
That too lol