closeup on a nesting of clarke's mining bee, anderna clarkella at the foot of a salix caprea tree

andrena clarkella andrenidae arthropod bee mining ecology hymenoptera insect nature animal biology bug clarke clarks color image detail detailed entomology flower fluffy hairy horizontal invertebrate leaf macro magnification male natural outdoor pollination pollinator single solitary springtime wild wildlife nest aggregation salix tree willow sand caprea