Seagulls - attacking people and marking cars - how to deal with them?

You can be sure they will try to find a way at 4am when he's not watching. Suspend it and enclose it in a cage that bigger animals cannot reach through.
 
You can be sure they will try to find a way at 4am when he's not watching. Suspend it and enclose it in a cage that bigger animals cannot reach through.
I have bird houses with a small doorway only small birds get in, but it's Ravens that are the problem here
 
Ah - I do get visited by a wood pigeon and two magpies, but they just give me the filthies and trot around the window in the hope that I might be kind.