Andy Sands / Leafcutter bee (Megachile willughbiella) flying with cut leaf section to seal breeding cell in insect box in garden, Hertfordshire, UK, August

Andy Sands / Leafcutter bee (Megachile willughbiella) flying with cut leaf section to seal breeding cell in insect box in garden, Hertfordshire, UK, August

Andy Sands / Leafcutter bee (Megachile willughbiella) flying toward insect box in garden, Hertfordshire, UK, August

Andy Sands / Leafcutter bee (Megachile willughbiella) sealed holes in insect box on garden shed which indicate occupation by bee, Hertfordshire, UK, August

Andy Sands / Leafcutter bee (Megachile willughbiella) sealed holes in insect box on garden shed which indicate occupation by bee, Hertfordshire, UK, August

Andy Sands / Circular cutout on leaf which the Leaf Cutter Bee (Megachile willughbiella) uses for nesting material. London, England, UK, July.

Andy Sands / Circular cutout on leaf which the Leaf Cutter Bee (Megachile willughbiella) uses for nesting material. London, England, UK, July.

Andy Sands / Leaf Cutter Bee (Megachile willughbiella) male resting on plant stem. Hertfordshire, England, UK, July.

Andy Sands / Leaf Cutter Bee (Megachile willughbiella) male resting on leaf. Hertfordshire, England, UK, July.

Andy Sands / Leaf Cutter Bee (Megachile willughbiella) flying back to nest in bamboo cane with pollen. London, England, UK, July.

Andy Sands / Leaf Cutter Bee (Megachile willughbiella) female basking. Hertfordshire, England, UK, July.

Andy Sands / Leaf Cutter Bee (Megachile willugbiella) collecting nectar from wild sweet pea flower. Hertfordshire, England, UK, July.