Early season bug walk. A lot of bees and very little of anything else. ID was tricky; I’m going by what I was told!
A couple of notes:
(1) a good web site: https://sites.tufts.edu/pollinators/2021/03/cellophane-bees-spring/
(2) “<There’s a> distinctive “S” shaped recurrent vein in <…> Colletes.”
A mantis ootheca, I believe:

I’m not sure if the bees belonged to just one species or to more. They all seemed like Andrena, to me, but so very very difficult to have any confidence in the ID.

A better view of the wing venation. Colletes inaequalis. “S vein” helps identify it.

“male Andrena, note the parallel eye margins (Colletes inner eye margins converge)”



Andrena:

Not bugs:




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