closeup on a colorful male yellow and black field cuckoo-bee or bumblebee, bombus campestris

arthropoda arthropod bee bombus campestris cuckoo bumblebee field cuckoobee hymenoptera insect nature psithyrus vestal animal biology cleptoparasite closeup entomology invertebrate macro outdoors parasite pollinator single solitary wild wildlife natural colorful male yellow black purple knapweed cuckoo-bee