This book provides concise and accurate details of the appearance, diagnostic features, distribution, habitat, and key behavioural characters of all mammals known to have occurred in Australia or its waters since the time of settlement by Europeans. It includes details of 156 species of marsupial, 2 monotremes, 76 bats, 64 native rodents, 10 seals, 44 whales and dolphins and 22 introduced species (total 376 species).