Lee Gambin examines the extremely popular subgenre of the ecologically themed horror film, or, the natural horror film. Since Alfred Hitchcock gave us The Birds, the natural horror film (where animals or insects cause tremendous damage to the human population) is a much-loved subgenre, but one seldom referenced. This book offers insightful critiques on numerous films such as Them!, Squirm, Orca, The Pack, The Day of the Animals, Prophecy, Tentacles and many more. Over 100 titles are discussed and Gambin thoroughly scrutinizes the social and political impact of these films, dissects fundamental stock standards of this subgenre, as well as offers informative anecdotes relating to the production of these diverse movies. He critiques specific narrative devices and offers an analysis of performance, audience appreciation and filmmaking craft.