What physical feature are carpenter bees known for?

Carpenter bees are characterized by their distinctive appearance, which often includes a black body complemented by yellow or white hair, particularly on their thorax. This coloration is significant as it helps in identifying them among other bee species. The bold coloration, especially in males with their more pronounced hair patterns, serves both as a means of species recognition and plays a role in mating behaviors.

While carpenter bees do create tunnels in wood, which is an essential aspect of their biology and ecology, the question specifically asks for a physical feature. Their coloration, thus, is the most relevant answer in this context.