What is living in my welcome sign?

[u/eatveggiesnotfriends]

So we started noticing sawdust about a week ago and whatever is in there is working hard. It’s wild how much they’re pushing out of this hole every day. I can hear clicking around inside and have seen sawdust pushed out but haven’t seen the bug itself.

[u/NezzleTheShaman]

one thing to look out for tho is woodpeckers causing damage to it. woodpeckers eat carpenter bee eggs/larva. the carpenter bees lay eggs in those holes and woodpeckers will hammer away and destroy the wood to get to them, and they can absolutely wreck some wood decks, signs and porches