PREMAPHOTOS / Dune snail bee {Osmia aurulenta} seals empty shell {Helix aspera} with leaf mastic for nest. UK

Nick Upton / Gold-fringed mason bee (Osmia aurulenta) nectaring on Rock rose (Cistus pulverulentus) in a garden planted with pollinator attracting flowers, Dungeness, Kent, UK. June.

PREMAPHOTOS / Dune snail bee (Osmia aurulenta) sealing snail shell (Helix aspersa) with leaf mastic to make nest, UK

Andy Sands / Silvery leafcutter bee (Megachile leachella), male, resting on empty snail shell among sand dunes. Cornwall, England, UK. July.

Nick Upton / Gold-fringed mason bee (Osmia aurulenta) nectaring on Horseshoe vetch (Hippocrepis comosa) on a chalk grassland slope, near Bradford on Avon, Wiltshire, UK, May.