Caring for and taking care of animals is one of the hobbies that humans have been practicing for generations.People and mammals have lived together over the years. Some of these mammals have been domesticated as truly beneficial to mankind, through its utilization in day to day circumstances and performance of the tasks and functions needed by the human race. Others have been domesticated for their meat, milk, and even skins and wool for human consumption.However, many other species remained wild and could not be domesticated by humans. They are still Seen in forests, reserves and zoos. The attached atlas covers the many varieties of mammals under those couple groups comprehensively, in accordance with commonly accepted classifications. It tries at the same time in a professional manner to provide appropriate examples of each type of animal, including photographs, distinctive illustrations of these different species according to their classification. It is an atlas that genuinely covers the world of mammals.