I rescued a small boobook owl this morning. I don't know what's wrong with hiim. He's holding his wings as though they are both dislocated but I can't find any bone problems. They're just ... floppy. He may have a concussion, or he'd been attacked by a larger raptor. That's highly likely given that even barn owls are twice his weight.
I'm keeping him overnight to see if he improves at all.