Wildlife

Okay, this is getting spooky!

I'm at work, upstairs today, putting figures on an Excel spreadsheet to do with how many pencils we sold last month [*yawns*] and our castle crows are on the roof.

Normally I can just hear a bit of cawing and flapping but today I can hear them stamping around and clatters and thumps, some of which are metallic. I think they are, and yeah I know it's crazy, trying to open the air con vent to get inside.

*peck, scrabble, thump, jingle*

How long to you think it will take them?