B urrowing rodents can cause extensive damage in organic production systems. The three most common species that cause damage are • California ground squirrels (Otospermophilus spp.)• pocket gophers (Thomomys spp.)• meadow voles (Microtus spp.) IDENTIFICATIONBody features, activity patterns, damage caused, and appearance of burrow entrances are useful in identifying burrowing rodents. California ground squirrelsGround squirrels are grayish-brown rodents (fig. 1) in the squirrel family that primarily live on or in the ground, although they occasionally climb trees to access fruit and nuts. They are active during the day, when they move around foraging for food. When alarmed, they give a loud chirp and often drop into burrows that

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