Ranging from the unfamiliar to the famous—from the inconspicuous, plankton-sucking Elktoe Mussel to the majestic, soaring Bald Eagle—endangered or threatened plants and animals of Kansas continue to play a vital, although diminished, role in the state's ecology. Providing, for the first time, easily accessible information for the professional naturalist and amateur nature lover alike, this guide highlights the habits and habitats of sixty plants and animals currently listed as endangered or threatened in Kansas and protected by state or federal law. The authors illuminate not only the common bond of these species—their precarious status—but also their widely varying routines, idiosyncrasies, and circumstances. All known Lake Scott Riffle Beetles in the world, they show, spend their lives in one spring area of Western Kansas while the nomadic Whooping Cranes alight only a night or two in the state's central and eastern swamplands during migration. For each species—three plants, three mammals, nine birds, eight reptiles, ten amphibians, fourteen fishes, and thirteen invertebrates—the guide features a full-color photograph, standard common and current scientific name, range map, threatened or endangered species status, and information on appearance, size, breeding, habits, surroundings, food preference, and natural history. The authors also list possible causes of species reduction, from loss of habitat through land use change, water diversion, and pollution, to hunting and fishing practices and natural selection. Richly illustrated and informative, this unique guide will be indispensable to anyone wanting to preserve the state's irreplaceable biological diversity.