Humpback whale：a first field guide to the singing giant of the ocean a first field guide to the singing giant of the ocean First field guide to the singing giant of the ocean African Elephant：a first field guide to the big-eared giant of the Savannah a first field guide to the big-eared giant of the Savannah First field guide to the big-eared giant of the Savannah Grey wolf：a first field guide to the wild dog from the wilderness Green sea turtle：a 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