Roger L. Hammer is a professional naturalist, botanist, and survivalist instructor for the reality TV show, Naked and Afraid. He received the first Marjory Stoneman Douglas Award from the Florida Native Plant Society and an honorary Doctor of Science degree from Florida International University. He is also the author of Everglades Wildflowers, Central Florida Wildflowers, Wildflowers of the Florida Keys, Complete Guide to Florida Wildflowers, Exploring Everglades National Park and The Surrounding Area, and Paddling Everglades and Biscayne National Parks. He lives in Homestead, Florida with his wife, Michelle. Zoologist Jim Kavanagh has made a career out of introducing novices to plants, animals, the sciences and world cultures. In addition to creating over 500 simplified nature guides, he has also authored guides to languages, cities and outdoor skills. An avid traveler and backpacker, Kavanagh's path has taken him around the world to many remote destinations including the upper Amazon, Africa, Australia, and the Arctic Circle (and this is just the As).

He is also the author of a series of state-specific guides to common species and natural attractions and a children's book on evolution.