European Butterflies: A Conservation Atlas

Sam Ellis has studied butterflies for more than 35 years, working for Butterfly Conservation (BC) from 2001-22, including as Director of Conservation and International Director. Pioneering BC's landscape-scale approach to conservation, he was responsible for developing and fundraising for more than 70 different projects. He is currently Chair of BC Europe and has published more than 100 papers and reports.

Martin Warren has studied the ecology and conservation of butterflies for more than 50 years, including research on threatened species, land-use management and climate change. He trained at Imperial College and University College London, and undertook a PhD on butterfly ecology at the University of Cambridge. He was butterfly specialist for the Nature Conservancy Council before joining Butterfly Conservation as their first Conservation Officer in 1993. He retired as the Chief Executive of Butterfly Conservation in 2016, and is currently Head of Development with Butterfly Conservation Europe. Martin has published more than 300 scientific papers during his career, as well as hundreds of reports, and is the author of the Butterflies volume in the British Wildlife Collection. In 2007 he won the Marsh Award for Insect Conservation from the Royal Entomological Society, and has appeared in the top 10 list of British conservationists in BBC Wildlife magazine. He was awarded an OBE for services to the environment in 2017.

Chris van Swaay has studied butterflies for 40 years and works for Dutch Butterfly Conservation on their conservation both in the Netherlands and the rest of Europe. He runs the Dutch Butterfly Monitoring Scheme developing butterfly trends and indicators, and has been involved in producing Red Lists as well as numerous papers and reports.