American Pika: Description and drawing of the tail less animal.Ochotona Princeps: Contains pictures, description, and classification information.Pika Project: Includes information on pika ecology, history and a description.Pikas: Wildlife Notebook Series: Provides general description for history, food habits, and predators of the hare-like pika.Total Yellowstone: Pika: Image and brief description of the little pika.Wikipedia: Pika: Encyclopedia article talks about the habitat, activities, and species of the Pika.