Not just for bees! All insects that are vital for our birds need shelter and over-wintering places too. This well-crafted insect cabin includes bamboo tubes and drilled wood. Fix to a tree in a sunny spot, or against a fence or wall.
Where in your garden? Choose a sunny position, preferably south-facing, with pollinator-friendly flowers and a source of wet mud in your garden to make life easier for Mason Bees.