closeup of the male of the grey-backed mining bee, andrena vaga on a yellow flower of dandelion , taraxacum officinale

andrena andrenidae arthropoda arthropods asteraceae backed bee bees close closeup dandelion ecology field flora flower grey greybacked grijze hymenoptera insect macro male mining nature officinale plant plants pollination pollinator sandbienen solitary taraxacum vaga weidensandbiene wildlife yellow zandbij