Habitat condition

Davies, H., Brereton, T.M., Roy, D.B. & Fox, R. (2007) Government targets for protected area management: will threatened butterflies benefit?. Biodiversity and Conservation, 16, 3719–3736.
Brereton, T.M., Warren, M.S., Roy, D.B. & Stewart, K. (2008) The changing status of the Chalkhill Blue butterfly Polyommatus coridon in the UK: the impacts of conservation policies and environmental factors. Journal of Insect Conservation, 12, 629–638.