"Siren sparrows," Lucius said.  It was an ongoing source of frustration because he had no idea where they had come from, or why they had set up a colony on his property, but there seemed to be more of the things every year, and they loved his hair.  Every time he went outside, one of them appeared and began to sing and while he stood there, mesmerized, a flock of them descended on his head, yanking out all the hair they could.  The only solution had been to shave his head and that didn't stop them from charming him into a dazed state, but at least he no longer came to with sharp pains in his skull.  "And they're protected.  Someone introduced a bill into the Wizengamot to recognize them as sentient creatures - "