Larry Master is a conservation biologist, a zoologist, and, in his retirement, a conservation photographer. He has been photographing wildlife and natural history subjects for more than 70 years. After doctoral and post-doctoral studies at the University of Michigan, Larry spent 20 years with The Nature Conservancy (TNC) and 6 years with NatureServe, most of that time as their Chief Zoologist. NatureServe is an offshoot of the Conservancy and is the umbrella organization for the network of natural heritage programs and conservation data centers in every U.S. state and Canadian province as well as in many Latin American countries. Larry started several of these programs (e.g., MI, NH, VT) and also oversaw the development of TNC's and NatureServe’s central zoological databases and revisions to the Network's Conservation Status Assessment methodology and the Element Occurrence Data Standard. He also served on EPA’s Science Advisory Board. Larry conceived and co-authored Rivers of Life: Critical Watersheds for Protecting Freshwater Biodiversity. He has also authored numerous other publications as well as chapters in several books (e.g., Precious Heritage, Our Living Resources). In his retirement he serves on boards of the Adirondack Explorer, the Ausable River Association, the Northern Forest Atlas Foundation, and the Cornwall Conservation Trust as well as on the Science & Recovery Advisory Board of Living with Wolves, the Vermont Center for Ecostudies' Advisory Council, the Biodiversity Research Institute's Advisory Group, The Biodiversity Conservancy's Advisory Board, and the American Society of Mammalogists' Mammal Images Library. Larry resides in Keene, NY and West Cornwall, CT.