The Cockatiel

One day Mrs Osborne visited D5 with a cockatiel on her shoulder. It had appeared that day in the library - maybe it was lost? The next day suddenly the cockatiel landed on Mrs Compston's head. The dad she was talking to grabbed a school book and put on his head  to protect it. The cockatiel then landed on Mrs Compstons head again. Mrs Osborne took it home and found the owner.