Ah, the multitudinous joys of home ownership. I finally got rid of all of the trees w/in "raccoon distance" of the house. But it seems I have other residents above the aeration grates of the eaves.
The grates are made of aluminum but they seem to be pliable enough for a small animal to bend them enough to slip in.
The question is, what sort of animal. The only thing that makes sense is bats. Long ago I noticed what seemed to be nesting material sticking slightly out from the back of the grates. I was curious but it didn't seem to be an issue. But now a second grate is showing similar signs.
If it is bats and they only stay in the eaves, I'm ok with that. But if they start cavorting in the attic, I will not be well pleased.
I think I'm just going to get up on a ladder and partially seal them. Either that or use some peppermint oil bombs. But first I'm going to position one of the new cams so it has a good view of all 3 eaves in that area. Stay tuned.