We have a chimney with no cowl (something we need to rectify!) Fireplace is just for show, we have lovely central heating.
Couple of times recently in the early morning we've heard a bird scratching around above the fireplace. Once everyone is awake we have moved everything out of the way, held up a sheet to protect the room from dust, removed the chimney sheep (TM), had a feel around and tried to rescue said bird.
NOTHING THERE AND SILENCE
So assume bird is managing to escape back up the chimney by itself.
Never had this before. Does this happen to other people??