Carpenter bees look like typical bumblebees but often lack yellow stripes. They are solitary bees.
General Habits – Unlike bumble bees, carpenter bees are solitary insects. Female carpenter bees will chew a tunnel into a piece of wood to build a nest gallery. 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 his constant buzzing causes concern for some.
Habitat – Carpenter bees bore through soft woods to lay eggs and protect their larvae as they develop.
Threats – Carpenter bees do not pose a public health threat, but they can damage wood through their nest building.
Source: National Pest Management Association