Green sea turtle：a first field guide to the ocean reptile from the tropics a first field guide to the ocean reptile from the tropics First field guide to the ocean reptile from the tropics Grey wolf：a first field guide to the wild dog from the wilderness Tiger：a first field guide to the big cat with the stripes Grey wolf：A first field guide to the wild dog from the wilderness Koala：a first field guide to the cuddly marsupial from Australia Emperor Penguin：a first field guide to the flightless Bird from Antarctica Humpback whale：a first field guide to the singing giant of the ocean a first field guide to the big cat with the stripes