12/28/2023 0 Comments Spiny pocket mouseThis species is less social than other pocket mice. Most individuals will survive for only one year a few individuals will live to be 15 to 18 months old. Because they are a precocial species, their life spans are short, resulting in a high turnover rate in the population. During this time females undergo a remarkable increase in weight. Reproduction occupies 6 months out of the year (January–June) with an average of 2 litters annually and 4 offspring per litter. They have also reportedly been known to locate seeds that are buried in dung. Because they are nocturnal, they often locate seeds by sense of odor. Because they are not often satisfied with a single meal, they can be found with cheek pouches full of seeds that are stowed away in their burrows and used when food resources are scarce. During other seasons these mice eat the seeds of many other species, including plants, corn, wheat, beans, castor beans, and the poisonous seeds of the guanacaste tree. In Costa Rica, it favors the seeds of the buttercup tree during the dry season. salvini eat some insects, they are mainly seed-eaters. It is a nocturnal species that lives in a variety of niches, including underground and in bushes, trees, rock clusters, and log shelters, but is most commonly found in brushy, weedy fields that provide shelter to its burrows and protection from predation.Īlthough H. Heteromys salvini reaches its greatest abundance in a geographic range that is mostly semiarid tropical lowland forest. It occupies much of the Pacific coast and adjacent mountains of Central America (from Costa Rica to Guatemala) and southernmost Mexico, usually from the lowlands to elevations of 1500 meters. salvini can be distinguished from other species by the lack of orange side stripes and a lack of dark forelimbs. The tail is approximately equal to the body length, bi-color, and nearly hairless (although it may have a short terminal hair cluster). The darker dorsal fur is meshed with dark spiny hairs and lighter, cream-colored hairs. ![]() Although the darkness of the fur can vary quite a bit geographically, it is always grey or grey-brown dorsally with cream-colored underparts, forelegs, and feet. Like other pocket mice, it has external, fur-lined pouches in its cheeks for carrying seeds and other materials.
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