BBC Radio 4 Nature programme – excellent documentary by Bret Westwood on the ecology and recent history of the large blue and the habitat management work at Collard Hill and Green Down.
Radio 4 Saving species Hear Jeremy Thomas and David Simcox talk about the re-introduction of the Large blue in the Cotswolds using larvae from both Collard Hill and Green down. Also featuring Sarah Meredith. Start listening from 9m 30.
Butterfly Conservation – National – Read about the work Butterfly Conservation have been doing within the Polden Hills for the Large blue butterfly.
Butterfly Conservation Somerset and Bristol branch – For details of excellent sites to visit in Somerset along with recent sightings and events.
Centre for Ecology and Hydrology (CEH) – This website has an excellent array of detailed information and research into the Large blue.
UK Butterflies – For the latest news from visitors to excellent butterfly sites across the country, including Collard Hill.
Somerset Wildlife Trust (SWT) – Details of the wonderful reserves managed by SWT in the county, including the donor site for Collard Hill – Green Down.
Gloucestershire Wildlife Trust (GWT) – Details of the wonderful reserves managed by GWT in Gloucestershire, including Daneway Banks.