Heather Colletes - Wragg's Quarry

I'm no expert on bees but my best guess is that these ground nesting bees in Wragg's are Colletes succinctus or Heather Colletes. They are much smaller than the Honey Bees, under 10mm in length, but with a similarly striped abdomen. They are very active close to the ground and probably number over 100.

Heather Colletes