Just a pigeon in the rain

Yesterday either Mr or Mrs Pigeon hit my lounge window with a terrific whack.  (S)he tottered through the back door of my garage which was open and I left him/her to recover.  Thankfully, after nearly an hour, (s)he was able to fly rather drunkenly out into the garden.  I must try one of those stickers you can put on windows in the hope of deterring them from doing it again.