|Fig. 1. A carpenter bee visiting a flower. Note the yellow hairs on the thorax and the shiny black abdomen, which is hairless. (Photograph Tom Murray www.pbase.com/tmurray74 )|
Fig. 2. A section of wood cut in half to expose the chambers or cells constructed by a carpenter bee. (USDA Forest Service Archive, USDA Forest Service, www.Bugwood.org)
Behavior: The males are territorial, and in the spring they often guard the potential nest sites. They discourage intruders by hovering or darting at any moving thing that ventures into the nesting area. This can create a "human annoyance" factor, and it is one that often startles and concerns the homeowner.
However, male carpenter bees do not sting. The female carpenter bee, like many other bees, can sting - but it is uncommon for her to do so.