From: "Rachel"

Typically, carpenter bees do not cause serious structural damage to wood
unless large numbers of bees are allowed to drill many tunnels over
successive years. The bees often eliminate their wastes before entering the
tunnel. Yellowish-brown staining from voided fecal matter may be visible on
the wood beneath the hole. Woodpeckers may damage infested wood in search of
bee larvae in the tunnels. In the case of thin wood, such as siding, this
damage can be severe. Holes on exposed surfaces may lead to damage by
wood-decaying fungi or attack by other insects, such as carpenter ants.

What a bunch of blithering ''the sky is falling'' nonsense.

The key word here being "large" numbers of bees, as in you'd have to have
hundreds of boring females to get to this point referenced so absurdly above.
Most of the carpenter bees one sees hovering around are competing males anyway,
who don't tunnel at all. There can be 10-20 of them competing for one female.


~flick