The burrow opening of a California ground squirrel, Otospermophilus sp., under a building.

California ground squirrel burrow opening under structure.; Tustin, Orange County Credit: Niamh Quinn,UCCE and South Coast REC, Used by permission
The burrow opening of a California ground squirrel, Otospermophilus sp., under a building. Credit: Niamh Quinn,UCCE and South Coast REC, Used by permission