Iolo's River Valleys - Episode Guide

Iolo Williams explores the Rheidol valley and looks for elusive pine martens. He's also treated to views of red kites nesting in a village and explores a remote zinc mine.

Iolo Williams explores the Dyfi Valley, from the Ynyslas dunes and the Cors Fochno bog to ospreys at Cors Dyfi and wild beavers near Machynlleth.

Iolo explores fascinating woodlands, searches for Curlew chicks and uncovers the history of an ancient burial chamber nestled in the beautiful Conwy Valley.

Iolo Williams explores the Vale of Clwyd, from coastal lizards and rare butterflies to a tame raven and elusive red squirrels, uncovering the valley's hidden wonders and wildlife.

Iolo Williams explores the Usk valley, from Newport's urban wildlife to ground-nesting birds, a huge lesser horseshoe bat roost and scarce firecrests.

Iolo Williams explores the Tywi river valley, from Llansteffan's coastal dunes to fallow deer ruts, ancient oak woodlands and the remote heights of the Tywi forest.

Iolo explores the Teifi river valley, and finds a slow worm hunting, meets a coracle fisherman, is thrilled by a fishing Otter, and watches a pair of kestrels at their nest.

Iolo explores the stunning Dee valley, from wintering birds along the estuary, to displaying black grouse on moorland, rare freshwater-pearl mussels, and spawning sea trout.