This video from the USA is called A huge Sand Bee colony near Palmdale, California.
Warden Erik van der Spek on Texel island in the Netherlands reports about a bee species, which is rare in the Netherlands as a whole.
Andrena argentata sand bees, however, are not rare in the sand dunes of Texel. Sometimes, there are colonies of thousands of individuals.
Texel island bees: here. And here.
Texel parasitic bees: here.
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