Iolo Williams explores four estates. In Singleton Park, Swansea, he carries out an experiment on a pair of long-tailed tits and learns about the resident insects. Show more

Iolo Williams explores wildlife havens. He visits Wepre Park, where he tracks down badgers and joins wardens surveying for rare great crested newts. Show more

Iolo Williams explores wildlife havens. He learns how Holyhead Breakwater Country Park transformed from an industrial site into an urban park. Show more

Iolo Williams explores wildlife havens. In Pontypool, he visits a park that is home to thousands of nesting bees and the rare native crayfish. Show more