How does the frass of a carpenter bee appear?

The frass of a carpenter bee primarily resembles sawdust because these bees create their nests by boring into wood. As they tunnel, they produce small particles that consist mainly of wood shavings, which are often mixed with saliva and other organic materials. This process results in a frass that has a fine, powdery texture akin to sawdust.

In contrast, frass from other insects may appear as small pellets or have granular qualities combined with debris, but carpenter bees specifically contribute to a sawdust-like appearance due to their wood-boring behavior. The other options, which suggest different textures or consistencies, do not accurately represent what carpenter bee frass looks like in comparison to the characteristic wood remnants they leave behind.