Rebecca Stefoff 
How Animals Play [PDF ebook] 

Ethology is the scientific study of animal behavior. It was widely thought that animal play, mostly in mammals, was part of Darwinian natural selection and somehow fit into survival of the fittest. However, animal researchers believe that animals play out of pure joy, rather than aiding in their survival. This jovial book about animal play, tells the secrets of, and the science behind, clever baboons that know which cars to break into for snacks, mighty elephants that grieve, tricky octopuses that squirt water, and beetles that read messages through their feet. This book includes explanative text by award-winning author Rebecca Stefoff and an extensive bibliography. Key scientific terms and phrases are explained and includes procedures for scientific observation.