Rediscovery of a high-altitude vole,Microtus californicus, in Baja California, Mexico

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The California vole, Microtus californicus, from the high-altitude meadows of the Sierra San Pedro Martir, Baja California, Mexico had not been documented in 90 y and was thought to be extinct from this locality. In July of 2015, we documented an active, but reduced, population at one of its early collection sites. This population appears to be extremely restricted and should be protected and monitored.