In this new series, Iolo Williams delves into the archives to see the fantastic wildlife that he's filmed in Wales during the past 25 years. He also explores the changes he's seen in Welsh wildlife in that time.

It all began for Iolo back in 1996 when he was still working as a warden for the RSPB. He was filmed for the series Visions of Snowdonia, tramping a remote moor looking for the nest of his favourite bird, the hen harrier. Since then, he has made many series for BBC Wales.

Browsing through the archive for the first episode of the series, he discovers delightful barn owl chicks in a Trawsfynydd barn, great crested newts in a housing estate pond in Johnstown, Wrexham and
dormice in a Gwent woodland. He also comes across a stoat on the Great Orme in Llandudno, and arctic alpine plants and relic fish from the ice age in Snowdonia.

Iolo Williams delves into the archives to see some fantastic wildlife that he's filmed in Wales during the past twenty-five years. He also explores the changes he's seen in Welsh wildlife in that time. In this episode, Iolo goes river dipping in the shortest of shorts in the Severn near Newtown, encounters slippery frogs in a freezing stream, and a family of otters on Stackpole ponds, Pembrokeshire. He recalls filming short-eared owls hunting on waste ground in Kinmel near Rhyl, and a stunning kingfisher on a pond created on reclaimed coalmine land in Dare Valley Country Park. Iolo also despairs over the species that have disappeared over the years including the high brown fritillary in Powys, lapwings in the south Wales valleys, and the extinction of the corn bunting in Wales.