This is a factual, fun-filled introduction to loons, ancient birds that have inhabited our planet's northern waters since about the time the dinosaurs died out. This book covers loon history, physiology, behavior, and coexistence with humans, with plenty of information for young researchers and older enthusiasts alike. Gorgeous paintings bring the text alive, showing loons diving, swimming, preening, raising chicks, and acting, well, just plain "loony." Suggested activities for home or classroom provide opportunities for further exploration of loons as kids learn how to walk, paddle, and float like a loon. An appendix offers more information on all five species of loons found worldwide. "Loon Resources" provides a list of books and web addresses for continued study, with links to photographs, recordings of loon calls, and information on organizations devoted to loon research and conservation.