The California Mouse (image) University of Texas at Austin, Texas Advanced Computing Center Share Print E-Mail Caption The California mouse (Peromyscus californicus) is a species of rodent in the family Cricetidae found in northwestern Mexico and central to southern California. Most rodents are polygamous, but the California mouse pair bonds, making it a model organism for researchers studying the genetics and implications of partner fidelity. Credit The University of California, Berkeley Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.