Seen a bird fly out of one of my side vents the other day.. I went up to check it out and filled 2 garbage bags up with hay/bird nest.. I went to the other side of the house and found another one.. I left it there for the time being.. This is not a close up pic.. Its easy 3 feet wide and 2 feet across. I patched my screen holes so the little terds cant get back in.. Used a whole bottle of wasp spray in the process.. Not a position I like very well.. Squatted over, wasp flying around you, shooting at em with a spray bottle, trying to stay on the rafters.. Very entertaining.. And HOT!!