Phil Savoie / Red mason bee (Osmia bicornis) female bee being followed by male Monmouthshire, Wales, UK. May.

Phil Savoie / Red Mason bee (Osmia bicornis) female nectar robbing from comfrey, Comfrey (Symphytum officinale), Monmouthshire, Wales, UK. May

Phil Savoie / Red mason bee (Osmia bicornis) female bee bringing in pollen load under her abdomen for brood cell Monmouthshire, Wales, UK. May

Phil Savoie / Red mason bee (Osmia bicornis) female bee bringing in pollen load under her abdomen for brood cell, Monmouthshire, Wales, UK. May

Phil Savoie / Red mason bee (Osmia bicornis) female bee capping off nest brood cell with mud, Monmouthshire, Wales, UK. June

Phil Savoie / Red mason bee (Osmia bicornis) female bee being followed by male, Monmouthshire, Wales, UK. May

Phil Savoie / Red mason bee (Osmia bicornis) feeding on Chive (Allium schoenoprasum), Monmouthshire, Wales, UK. July

Phil Savoie / Red mason bee (Osmia bicornis) female bee bringing in pollen load under her abdomen for brood cell in bee hotel. Monmouthshire, Wales, UK. May.

Alan Williams / Blue mason bee (Osmia caerulescens) resting on brick wall in garden. Cheshire, England, UK. June.

Alan Williams / Red mason bee (Osmia bicornis) female sealing entrance to nest hole in bee nesting box. On wall of house, Cheshire, England, UK. May.

Karine Aigner / Mexican free-tailed (Tadarida brasiliensis) bats emerge from the Eckert James River Bat Cave Preserve bat cave in Mason, Texas, USA. July 2015.

Rod Williams / Red mason bee (Osmia bicolor) male feeding on Green alkanet (Pentaglottis sempervirens) Beverley Court Gardens, Lewisham, London, England, UK. April.