Research and Publications
Butterfly numbers and weather: predicting historical trends in abundance and the future effects of climate change. Journal of Animal Ecology, 70, 201-217.
(2001) Drought reduces breeding success of the butterfly Aglais urticae. Ecological Entomology, 22, 315-318.
(1997) Increased fluctuations of butterfly populations towards the northern edges of species' ranges. Ecography, 17, 215-220.
(1994) Was it a migration - the exceptional abundance of the large white butterfly Pieris brassicae (L.) in 1992. Entomologist, 113, 211-216.
(1994) Atlas Of Butterflies In Britain And Ireland. Viking, Harmondsworth.
(1984)