There are more than 4,500 species of bees in the world commonly referred to as “Miner” bees. This one in particular, the Andrena astragali, is a specialist that likes to forage on a plant called the “Death Cama” AKA Toxicoscordion.
The Death Cama is known for being poisonous as it contains a type of neurotoxin that is harmful to just about everything in every part of it, even the nectar. Everything except Andrena astragali that is.
We know honey bees show preference to flowers with higher sugar content in the nectar and with the pollen that has particular nutrients such as proteins, amino acids, etc.. they need for brood rearing and such. The Botanic Garden of Wales says they have been able to pin down the most preferred flowers by honey bees.
It might inspire your garden and beekeeping related planting plans.
National Botanic Garden of Wales research reveals which plants bees choose their pollen from.