Christophe Dufresnes and Mila Pajkovic are field biologists and wildlife photographers based in Switzerland. After obtaining a Masters degree in the wilderness of the Australian outback, Christophe obtained his PhD in Biology at the University of Lausanne on amphibians, during which he conducted numerous studies on the evolution, genetics and conservation of several European species, notably tree frogs and green toads, involving fieldwork all over Europe. Mila has been interested in wildlife and field guides since her childhood. She recently started a PhD in Biology on the population genetics of butterflies.