What is a potential issue with carpenter bees in buildings?

Carpenter bees are known for drilling holes in wood, which is a significant concern for property owners. Unlike some other bee species that nest in soil or create mounds, carpenter bees excavate tunnels in wooden structures to create their nests. This behavior can lead to structural damage over time as the drilling weakens the integrity of the wood. They typically prefer untreated or weathered wood, making decks, eaves, and fences prime targets for their nesting activities.

The other options highlight various behaviors that are not characteristic of carpenter bees. For instance, they do not build nests in soil or create mounds, nor do they pose a direct competitive threat to honeybees. Understanding the behavior of carpenter bees is crucial for effective pest management and prevention strategies.