Wren finds food in mossy crevices

When I'm looking out of the kitchen window early in the morning I often see this little wren rootling around in the front garden. Here it's pecking tiny animals from the moss that grows between the paving bricks in the garden path. I often see people pressure-washing away the moss that grows in the crevices in block paving, which seems a pity, since mosses are home to an enormous range of tiny organisms that sit at the bottom of food chains. One way to make a garden more wildlife friendly is to encourage the moss growth.