Species 'at risk of vanishing' from area of Wales' largest national park

The National Trust warns species are on the brink of extinction in a valley of Eryri - Snowdonia - National Park.The National Trust warns species are on the brink of extinction in a valley of Eryri - Snowdonia - National Park.The National Trust warns species are on the brink of extinction in a valley of Eryri - Snowdonia - National Park.