Numerous drift sand “specialists” among bees and wasps (Hymenoptera: Aculeata) nest in wetlands that spontaneously form de novo in arable fields

•Most conservation approaches neglect or insufficiently control landscape dynamics.•We examined 34 Czech wetlands that formed spontaneously de novo on arable fields.•The examined sites hosted many threatened reed bed specialists among bees and wasps.•Species specialized for drift sands and open sand...

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