closeup on a male of the endangered nycthemeral miner bee, andrena nycthemera eating pollen from willow, salix

aaaa arthropoda andrenidae arthropod bee dawn ecology europe flora hymenoptera insect location magnification nature other plant parts salicaceae salix animal antenna biology botanical botany closeup detailed eating endangered entomology flower flowering fluffy from grey hairy invertebrate macro male miner mining natural nycthemera nycthemeral outdoors pollen pollination pollinator protected rare single sitting solitary wild wildflower wildlife willow andrena