Xenopus is a genus of African clawed frogs. Despite their occurrence i n such diverse habitats as rainforests, lowland swamps, and alpine lak es--and their widespread use in laboratory research--the biology of th ese animals in their natural environments has never been reviewed. Thi s volume provides the first comprehensive account of the taxonomy, eco logy, behaviour, genetics, immunology, sensory physiology, and evoluti on of this group, with contributions from leading researchers in these fields.