It's summer and peak season on the summit of Snowdon. It's time for Iolo to get away from the crowds to look for peaceful, stunning scenery and spectacular wildlife. In secret hidden sites, he finds buzzards nesting, beautiful dragonflies and night-flying moths being hunted by migrant nightjars from Africa. There's a colony of rare silver-studded blue butterflies who were once living by the sea but today have been isolated inland as the coastline has changed. Iolo also climbs Cadair Idris, the highest peak in the southern part of the park, and explores extraordinary sand dunes full of colourful orchids along Snowdonia's 30 miles of stunning coast. But summer isn't complete for Iolo without a day on the moors watching the most threatened bird of prey in Britain - the hen harrier.
Source: BBC 4