"National Geographic Encyclopedia of Animals" is a copyrighted natural animal science series with 20 volumes in total, including "The Wonderful World of Animals", 5 volumes of "Mammals", 5 volumes of "Birds", 4 volumes of "Fish", 2 volumes of "Reptiles", and "Amphibians". 2 Volumes of "Animals" and "Invertebrates". The volumes are independent of each other and unified. With authoritative species classification, more than 4 million words, and more than 3,000 high-definition pictures, such a huge content is only used to introduce one world - rich in nearly 200 species. The animal world is home to all kinds of wonders of life. This book shows us these extremely diverse life organizations on the earth, leading us into this huge and complex world, and understanding its mysteries. This is a scientifically rigorous animal encyclopedia, which is spiritual food for teenagers to increase their knowledge of natural sciences.