There are several non lethal means of getting rid of them.
Carpenter bee in attic.
Finding carpenter bees in bathroom in most cases one of the situations described above is what causes some to end up inside the home for sure.
Carpenter bees are pollinating insects so you may want to learn how to get rid of carpenter bees naturally.
Buy or build a trap and hang it directly above the bee hole.
Honey bees in the attic are often an overflow from a hive in a wall or at the eave where it is cool enough to sustain wax and protect honey stores.
Though not the best of situations be thankful this is happening into the attic and not the main living spaces.
Here females lay their eggs while males burrow until spring.
Carpenter bees in the attic.
Carpenter bee traps are convenient to use and offer a non toxic method of elimination.