More mining bees

In past years I’ve found tawny mining bees (Andrena fulva) in the lawn. This year they are back (as are the holes in the lawn).
Spring!
but they are not alone. Another mining bee, Andrena cineraria, is here:
Andrena cineraria?
Like A. fulva, these are harmless – and beneficial as crop pollinators.
Near the nests I’ve also seen Nomada sp. “cuckoo bees”:
Nomada sp.
Like cuckoos, these lay their eggs in the nests of other species – mining bees. Their larvae feed on the pollen stored for the mining bees’ larvae, and then the mining bee larvae themselves. Nature can be brutal, but somehow the miners survive, presumably by breeding faster than the Nomadas can predate them.

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