The temperature and altitudinal gradient induce wide diversity in animal in Garhwal Himalaya. Rich biodiversity is essential for the stability of mountain ecosystem. Animal diversity is unique in Garhwal Himalaya. The diversified physico-climatic condition obtaining in the region of Garhwal Himalaya reflected in a variety of animal species including different types of mammals, birds and numerous species of wildlife. Diversity of surface relief resulting in to sharp variations in temperature and rain fall mainly controls and conditions the growth, distribution and density of forest cover in the entire region. Temperature, which is regulated,modified by the altitudinal variation particularly in outer Himalayan ranges of the region,is primarily responsible for determining the type, pattern and spatial distribution of fauna and habitat type through out the area. This book contains 11 Chapters and 23 Tables, which is valuable for U.G. and P.G. students of Environmental Sciences,Zoology, Wildlife management,Life Sciences and Natural Sciences.It is hope that, this book will help the students to understand the concept of climatic Factor and their impact on animal(Faunal)diversity.