Dr. Harvey B. Lillywhite is Emeritus Professor of Biology at the University of Florida. He is past Director of the Seahorse Key Marine Laboratory and has held international visiting positions at six universities, NASA-Ames Research Laboratory, and Scripps Institution of Oceanography. He has published 4 books and numerous articles related to biology of snakes, with emphasis on understanding adaptation of structure and function relating to ecology, behavior and evolution. Dr. Lillywhite has conducted field research in Costa Rica, Australia, India, Fiji, Philippines, Thailand, Taiwan, and other parts of Asia. He was listed in the top 2% of scientists worldwide based on standardized citation indicators. Dr. Marcio Martins is a Full Professor of Ecology at the University of São Paulo, Brazil. He has published 4 books and numerous scientific articles on the natural history, ecology, and conservation of frogs and snakes, including several studies on island snakes from Brazil and Mexico. He has been participating actively in the production of red lists of amphibians and reptiles (both in Brazil and for the IUCN). He was the president of the Brazilian Society of Herpetology (BSH) from 2011 to 2019 and is now a member of the IUCN Viper Specialist Group.