This book explores what makes an animal a mammal - how their characteristics are different from other groups of animals. It shows many examples of different types of mammals in their natural environment. The simple text, suitable for children aged 5+, is accompanied by large, attractive photographs. For children progressing through book bands it is suitable for reading at band 8: Purple. This book is part of the 'In the Animal Kingdom' which explore the classification of animals. Why not look for them all: Amphibians live on land and water; Birds have feathers; Fish live in water; Reptiles have scaly skin; Invertebrates have no backbone; Mammals drink milk.