closeup on a fluffy female nycthemeral mining bee, andrena nycthemera sitting on top of yellow willow pollen

arthropoda andrena nycthemera andrenidae arthropod bee color dawn ecology flora hymenoptera insect nature plant salicaceae salix animal biology botanical botany closeup endangered entomology flower flowering fluffy hairy invertebrate macro male mining nycthemeral miner outdoors pollen pollinator protected red list single solitary white wild wildflower wildlife yellow natural female willow