Carpenter bees are 1 inch long and look like typical bumblebee, but often lack yellow stripes.
Unlike bumble bees, carpenter bees are solitary pests. Female carpenter bees will chew a tunnel into a piece of wood to build a nest. The bits of wood she chews and deposits outside the nest are called frass. The male carpenter bee guards the outside of the nest. He does not have a stinger, but, this constant buzzing causes concern for some.
Carpenter bees prefer bare wood, so painting and staining wood can sometimes deter them.