If you spot a large bee buzzing around your home that looks like a
shiny bumblebee without its fuzz, it's probably a carpenter
Carpenter bees may want to share your home sooner or later if you
have a wood house or a wood deck. Females bore half-inch-wide holes
into wood and then excavate a burrow to raise their young, often
reusing old nests year after year.
Extension entomologists agree that the best way to prevent
carpenter-bee damage is to keep wood surfaces painted (stains don't
deter them nearly as well). Some people have good luck plugging bee
entry holes with aluminum window screening held in place with duct
tape. After a few weeks, remove the duct tape and fill the hole
with wood putty.