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.
What is sitting in the tree and waving (hello/farewell)?
A Huhu
That's not only a play on words. Uhu is the German word for GHO. By adding the H it turns into an interjection and word that's used when people call out in greeting/to get another person's attention. At the same time it's how Germans imitate a GHO's hoot - huhu.
Oh cool! I'll have to keep this one in mind for if I ever get to tell jokes in German lol
I took it to mean you can just hoot at them as a way of saying hello 🤗
That too lol