Eastern and Western Spotted Skunks were for years thought to be one and the same species, but they differ in an important detail of the reproductive process. In the Western Spotted Skunk, a very long period of delayed implantation occurs. Learn more about the Spilogale gracilis, more commonly known as a Western Spotted Skunk, in this easy-to-read species overview by the Smithsonian's National Museum of Natural History.