In the Bywater compost a millipede dawdles along, nibbling away at every bit of decaying plant tissue it can find. Its pinprick-sized droppings are black and nutritious--pure dirt.

Soil mite nymphs like teeny hairy honey drops clump and cling to the millipede as it meanders through the zoo.

A slater (sow bug) creeps down dark compost alleys, pauses when it's safe, licks fungus from its sticky feet. She finds a friend and they clean each other's silver armour.

A tiny golden brassy snail slides up onto a pill bug's back. He curls up to snooze during his slow taxi ride.