unhealthy addiciton to fresh air

because of aforementioned addiction I left a window slightly open when I left home. by slightly I mean palm-wide. Not a good idea.

I came home, the apartment is in the dark, as it is past 6 pm, and husband is not yet back from work. I go to the living room to turn on the lights,as...

I have:

1) a moment of shock as something alive jumps in front of me
2) five minutes of panic as I realize that this is a pigeon and try to get rid of him by waving my scarf and opening the balcony door wide
3) an hour of being very very annoyed as I pick up the pigeon's excrement in the most unusual places

the morale: screw the fresh air. kill pigeons.