The smallest Perognathus species of all, the Silky Pocket Mouse is among the smallest rodents in North America. These Mice are most active on cool, humid nights, typically foraging for fallen seeds by sifting sand with their tiny forepaws. Learn more about the Perognathus flavus, more commonly known as a Silky Pocket Mouse, in this easy-to-read species overview by the Smithsonian's National Museum of Natural History.