Unlike social bees, such as honey bees, they’re solitary. “Mason bees build their nests in pre-existing cavities, such as holes in wood, hollow stems, or bee hotels,” says Michael Skvarla ...

Solvin Zankl (Germany) carefully watches a two-coloured mason bee build the roof of its nest. While exploring a favourite haunt in central Germany, Solvin came across several tiny piles of sticks on ...

Three-quarters live nest in the ground, Hunter says, laying their eggs in tunnels just below the surface. Examples of common ...