KRYSTAL TOLLEY, American born, is head of the Molecular Systematics Laboratory at the South African National Biodiversity Institute at Kirstenbosch. She received her PhD in Norway, originally working on marine mammals. Since moving to South Africa, she has published numerous scientific and popular articles on chameleons. She has spent many days in the field searching for chameleons across southern Africa, and has a keen interest in understanding their biodiversity. MARIUS BURGER became interested in reptiles and amphibians at a young age. He studied conservation, but made herpetology his profession. His work has allowed him to travel throughout southern and central Africa and Madagascar, where he conducts surveys of reptiles andemphibians, leads tour groups, and participates in TV documentaries.