close up of a cleptoparasite, cuckoo black-thighed epeolus variegatus solitary bee sitting on a green leaf

arthropoda arthropod bee belgium ecology epeolus variegatus europe hymenoptera insect magnification nature animal antenna biology black thighed blackthighed cleptoparasite close up closeup cuckoo detail detailed entomology invertebrate kleptoparasite kleptoparasitic macro natural one outdoors parasite pollinator single sitting solitary variegated cuckoobee wild wildlife