In this episode, Iolo visits a beautiful bluebell wood in Slebech Park and discovers fascinating insects as well as badgers living there. An old oil storage site near Pembroke has been left to nature and now is a surprising place to find hundreds of colourful orchids and silver-studded blue butterflies. Iolo also walks round St David's Head where he finds fearsome-looking beetles and Britain’s only venomous snake.

Iolo Williams exploring Pembrokeshire’s less well-known wildlife spots away from the well-trodden tourist paths. Iolo searches the lower slopes of the Preseli Mountains and finds newly arrived migrant birds, including one which nests under rocks. He also hunts for the mesmerizing lights produced by glow worms near Martin's Haven. And he experiences a real treat , watching an iconic nocturnal bird, the barn owl, hunt over rough grassland at dusk.

Iolo Williams tracks wildlife in one of Wales' extraordinary landscapes - the Cambrian Mountains. In this episode Iolo heads to the Tywi forest to look for goshawks. They're big formidable birds of prey and became extinct in Wales by the end of the 19th century, but since the 1960s they have gradually re-colonised the Cambrian forests. Iolo tracks them during the late part of the nesting season and finds fully grown chicks in a huge nest with bits of eaten prey below. Iolo also explores the Elan Valley to find one of Wales' most critically endangered bird species, the curlew, as they attempt to breed on rough ground near the reservoirs. And he discovers a stunning day-flying moth called the Welsh Clearwing. It's so rare that it can only be found in a handful of places in Britain and its stronghold is in the Cambrian Mountains.

Iolo Williams tracks wildlife in one of Wales' extraordinary landscapes - the Cambrian Mountains. In his final trek of the series Iolo looks for a golden eagle. It's a bird you wouldn't expect to see in Wales as it became extinct there over 400 years ago. But an escaped golden eagle has been secretly living in the Cambrian Mountains for nearly ten years. Iolo scours woodlands and the Cambrian hills to find this magnificent bird of prey. It's a bird with a seven-foot wingspan, making it nearly three times the size of a buzzard or a red kite. So you would think that it’s easy to find, but the eagle has a huge flying range and doesn't seem to want to be found.