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.
The National Trust's Large Blue Blog 
With excellent weather forecast this week, and the general early emergence of most British butterflies this year, do you think we might see Large Blue emergence pretty soon?
Hi Roger,
Thanks for your message, sorry for the delay replying. As you can see from the other blog entries the flight season is now well underway and we had a good handfull on the wing yesterday. With the good weather predicted for the weekend the prospects are good.
Rob