The western harvest mouse (Reithrodontomys megalotis) is a small neotomine mouse native to most of the western United States. [3] Many authorities consider the endangered salt marsh harvest mouse to be a subspecies, but the two are now usually treated separately. [1]

2016年6月25日 · The western harvest mouse is the smallest of the rodent species found in Channel Islands National Park. It occurs only on Santa Cruz Island within the park, but also on Santa Catalina and San Clemente islands.

The western harvest mouse (Reithrodontomys megalotis) is a small neotomine mouse native to most of the western United States. Many authorities consider the endangered salt marsh harvest mouse to be a subspecies, but the two are now usually treated separately.

Working with others to conserve, protect and enhance fish, wildlife, plants and their habitats for the continuing benefit of the American people.

Western harvest mice build spherical nests. These are usually located directly on the ground, beneath the cover of grasses, bushes, weeds, or logs. These nests are about 125 mm in diameter.

The Western Harvest Mouse (Reithrodontomys megalotis) occurs across the western United States, from the Rocky Mountains and the Upper Midwest south to Mexico. In recent years, they have extended their range as far east as Indiana.

The relatively small Western Harvest Mouse averages 5 1/2 inches long and less than 1/2 ounce in weight. Its scaly tail comprises more than half of its length. The upper fur and tail color appears grayish brown, with a darker midline and buffy sides.

2017年7月13日 · The Western Harvest Mouse is a small and dainty mammal which can be distinguished from other members of its family by: 1) tail that is as long as the head and body, 2) fur that is soft, relatively long, and colored brown with black guard hairs on upperparts, 3) white underparts and feet, 4) tail with broad dark stripe on top and white ...

2020年10月31日 · The western harvest mouse is common in California and widespread in western North America. Two subspecies, R. m. distichlis (Salinas harvest mouse) and R. m. santacruzae (Santa Cruz Island harvest mouse), are listed in California’s Special Animal List (CDFW 2019) as Critically Imperiled due to the status of their habitats.

2023年9月11日 · These harvest mice favor grassy and weedy habitats such as lightly grazed pastures, meadows, fencerows, fallow fields, and edge habitats between agricultural and riparian areas. Meadows, marshes, and weed-covered banks of irrigation ditches seem to offer optimum habitat conditions.