Smithsonian National Museum of Natural History, North American Mammals
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Peromyscus dickeyi

Dickey’s Deermouse

Order: Rodentia
Family: Cricetidae


Conservation Status: Critically Endangered.

Each tiny island in the Gulf of California seems to have its own deermouse, and Tortuga Island is no exception: Dickey's Deermouse is known only from this island, and like the others, it is not well-known. Genetically, it is closest to Peromyscus merriami, which occurs on the mainland on the east side of the Gulf, and further studies may conclude that it is a subspecies of P. merriami. Most deermice have tails that are longer than their head and body combined. The tail of Dickey's Deermouse is comparatively short and its body is somewhat stocky. When the original specimens were collected, in 1932, it was reported that four young mice were taken from a nest under a rock where a rattlesnake also lurked, probably with a meal in mind.

Range: Total Length: 186-203 mm Tail: 90-100 mm

Range: 23-35 g


Burt, W.H., 1932. Transactions of the San Diego Society of Natural History, 7:176.


Mammal Species of the World

Distribution of Peromyscus dickeyi