Also known as the two-coloured mason bee, this beautiful bee is famous for nesting in old snail shells.

Pellitory-of-the-wall is a small to medium-sized herb that frequently grows from cracks in old stone walls, pavements, cliffs and banks, and churches and ruins.

The greater horseshoe bat was once a cave-dweller, but now tends to roost in old buildings, such as churches and barns. It is rare in the UK and, like many other bats, declining in number.

The lesser horseshoe bat was once a cave-dweller, but now tends to roost in old buildings, such as stables and barns. It is rare in the UK and, like many other bats, declining in number.