closeup on a male cellophane solitary bee, colletes cunicularius peaking from the opening of it's underground nest

arthropoda arthropod bee belgium cellophane colletes cunicularius colletidae early ecology europe hymenoptera insect location nature adult animal biology brown close up closeup colletid entomology fluffy garden hairy invertebrate isolated macro male moustache nest opening outdoors peaking plasterer pollinator sand single solitary spring mining underground vernal wild wildlife