closeup on an aggregation of four vestal cuckoo bumblebee, bombus vestalis , sitting on a purple spear thistle flower

bee black color flora four hymenoptera insect magnification nature plant psithyrus aggregation animal botanical bumblebee cleptoparasite close closeup colorful common detailed entomology flower fluffy group hairy invertebrate macro one outdoors parasite pollinator purple several solitary thistle vertical white wild wildflower wildlife yellow