Iolo Williams explores the wild side of towns and finds birds and animals that have adapted to life on the street. They've discovered it's a great place to get food and a safe place to raise a family. Some commute daily to town. Birds simply fly above the traffic, while four-legged animals use their own 'rat' routes. For these wildlife townies, the street is a place called home. In this urban wild tour, it is spring in town. Birds and bees are active on the streets of Colwyn Bay. Robins, sparrows, tits, wagtails and pigeons are nesting in drain pipes, road signs, wall holes, security cages and, in Brecon, even on a traffic light. A family of badgers are having a midnight feast. Fox cubs wait for their mother on a garden wall as she returns from Newport's town centre. In the South Wales valleys town of Deri, what can only be described as a nature reserve has been created in the back garden of a terraced house. It has a fantastic pond full of newts, dragonflies and damselflies and a stunning hay meadow full of beautiful wild flowers, butterflies and maybugs. To cap it all, hedgehogs visit the garden at night.