The male carpenter bee is aggressive, as it protects the nest, but it doesn't have a stinger. Only female carpenter bees have a stinger, though they rarely sting unless grabbed or squeezed.

Behavior Differences Carpenter bees are less social than bumble bees and typically nest alone rather than in a colony. Bumble bees live in colonies with a few hundred insects that include a queen ...

The male carpenter bee is always on the defense; after mating, its main job is to protect the nest. Although it does not have a stinger, its larger size and aggressive nature help it ward off ...