John M Halley is of Irish origin and is based in Ioannina, Greece. His research interests focus on the application of mathematics to ecology, especially to the conservation of biodiversity. Recent work focuses on the biodiversity crisis and how we can predict the extent and rate of extinctions caused by deforestation and habitat loss. Since 2012 he is responsible for the University of Ioannina field station in Zagori, Epirus. For many years he has also been interested in the relationship between science, faith and conservation and between 2012 and 2015 was responsible for the THALIS-SAGE program, examining the biodiversity benefits of the Church protected forests in Epirus.