What defines the physical appearance of male and worker Bombus vestalis individuals?

Answer

They possess prominent yellow bands on their bodies

Unlike the queen, which is primarily black with a small white tip, the males and workers of this species exhibit yellow banding. This coloration is a distinct identifying marker compared to the queen phase, and observing the patterns of all individuals in an area can help distinguish the population from other species.

What defines the physical appearance of male and worker Bombus vestalis individuals?
speciesinsectbeebumblebeepollinator