Perognathus merriami (Merriam's Pocket Mouse) is a species of rodents in the family Heteromyidae. It is found in the Neotropics and the Nearctic. It is a solitary, nocturnal browser. Individuals are known to live for 30 months and can grow to 8 g. Reproduction is dioecious. Merriam's Pocket Mouse relies on saltation to move around.
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