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The long-tailed shrew has a hind foot length of 12–15 mm (0.47–0.59 in), and can have a total body weight of 3.1 to 8.3 g (0.11 to 0.29 oz). The tail is furry with hair that is faintly bicolored. In older long-tailed shrews, a loss of hair from the tail may be exhibited.
In a long-term study done in Alaska, Yom-Tov and colleagues (2005) found that the masked shrew's body size contradicts Bergmann's Rule. [4] The study, done on 650 specimens and spanning from 1950 to 2003, examined body size in relation to ambient temperature. Measurements of body weight and the length of the tail, ear, hind foot, and body were ...
It is 55 to 82 millimetres (2.2 to 3.2 in) long and weighs 5 to 12 grams (0.2 to 0.4 oz), and has velvety dark brown fur with a pale underside. It is one of the rare venomous mammals. [4] Juvenile shrews have lighter fur until their first moult. The common shrew has small eyes, a pointed, mobile snout and red-tipped teeth. It has a life span of ...
The American pygmy shrew is the smallest mammal native to North America and is one of the smallest mammals in the world, just slightly larger than the Etruscan shrew of Eurasia. Its body is about 5 cm (2 in) long including a 2-cm-long tail, and it weighs about 2.0 to 4.5 g (0.07 to 0.16 oz). [ 9 ]
The greater long-tailed shrew tenrec is found in eastern Madagascar at altitudes between 440 and 1,950 metres (1,440 and 6,400 ft) above sea level, its range extending from Marojejy southwards to Andohahela. It is an arboreal species and is found in both primary and somewhat degraded humid forests. [2]
The São Tomé shrew (Crocidura thomensis) is a white-toothed shrew about 3.0 in (7.6 cm) long found only on São Tomé Island, São Tomé and Príncipe. It is listed as a critically endangered species due to habitat loss and a restricted range. It was discovered in 1886. The population continues to decrease, making these animals rare.
The smoky shrew is active year-round. It is dull grey in colour with lighter underparts and a long tail which is brown on top and yellowish underneath. During winter, its fur is grey. Its body is about 11 centimetres (4.3 in) in length including a 4 centimetres (1.6 in) long tail and it weighs about 5 grams (0.18 oz).
The Preble's shrew is known to live in Western North America, from the Columbia Plateau to the northern Great Plains. Specimens have been found in northeastern California, northern Nevada, [5] central and eastern Oregon, southeast Washington, western Idaho, all of Montana, western Wyoming, central Colorado and north of the south shores of the Great Salt Lake in Utah. [6]