Which feature is characteristic of a carpenter bee?

The characteristic feature of a carpenter bee is its black head and yellow thorax. This specific coloration is distinct in carpenter bees, as their bodies typically exhibit a robust, somewhat hairy structure with the thorax being notably yellow. The black head helps to differentiate these bees from other similar species, particularly with its contrasting coloration.

Carpenter bees are often mistaken for bumblebees due to their similar appearance; however, the more defined black and yellow coloration is a key identifying factor. This coloration plays a role in helping them blend into their environment as pollinators, while also making them recognizable to those trained in identifying local bee species.

In contrast, the other provided options do not accurately represent the typical features of carpenter bees. For example, bright red heads and green thoraxes are not characteristics of this species, nor are striped abdomens with spikes, which suggest a different type of insect altogether. Furthermore, large wings and long antennae are not defining traits of carpenter bees, as their wings and antennas are proportionate to their body size and do not have exaggerated features compared to other bees. Thus, the black head and yellow thorax serve as definitive characteristics that identify carpenter bees in their natural habitat.