The western harvest mouse is often considered an edge species. (nps.gov)
The western harvest mouse has a high potential reproductive rate. (nps.gov)
On this hike, Clarkson, instructor and director of the Nature Awareness Program at the Riekes Center for Human Enhancement, in nearby Menlo Park, California, is eager to see whether the class can find signs of two of the park's endangered species: the salt marsh harvest mouse and the California clapper rail. (edutopia.org)