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Common & Eurasian pygmy shrews (genus Sorex), size comparison. The common shrew is not an endangered species, but in Great Britain it, like other shrews, is protected from certain methods of killing by the Wildlife and Countryside Act of 1981. [16] In Britain, shrews can be found at densities of up to one per 200 m 2 (240 yd²) in woodlands.
The hind foot is 16 to 18 mm (0.6 to 0.7 in) long and the weight is 11 to 14 g (0.4 to 0.5 oz). Both the dorsal pelage and the underparts are iron grey. [5] The large size, robust tail and various details of the dentition help to distinguish this shrew from other species. [3]
All shrews are tiny, most no larger than a mouse. The largest species is the Asian house shrew (Suncus murinus) of tropical Asia, which is about 15 cm (6 in) long and weighs around 100 g (3 + 1 ⁄ 2 oz) [2] The Etruscan shrew (Suncus etruscus), at about 3.5 cm (1 + 3 ⁄ 8 in) and 1.8 grams (28 grains), is the smallest known living terrestrial mammal.
Northern short-tailed shrew. This shrew has a total length of 108 to 140 mm (4.3 to 5.5 in), of which 18 to 32 mm (0.71 to 1.26 in) is tail; and weighs 15 to 30 g (0.53 to 1.06 oz). [5] The species exhibits slight sexual dimorphism in size, with the male being slightly larger than the female.
The southern short-tailed shrew is the smallest shrew in its genus, measuring 7 to 10 cm (2.8 to 3.9 in) in total length, and weighing less than 14 g (0.49 oz).It has a comparatively heavy body, with short limbs and a thick neck, a long, pointed snout and ears that are nearly concealed by its soft, dense fur.
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 Mexican large-toothed shrew is rather large with a total length of 11.8 cm or more and a hind foot of 1.5 cm. Its pelage is a comparatively light (to other shrews in the family) mixed russet and black, with chamois colored ventral parts. The skull of S. macrodon is large and heavy with bulky teeth and reinforced margins of the anterior ...
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 ...