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The American water shrew is a sexually dimorphic species in which the males are generally larger and heavier than the females. The size of the shrew is 130–170 mm (5.1–6.7 in) and weight is 8–18 g (0.28–0.63 oz).
The Eurasian water shrew (Neomys fodiens), known in the United Kingdom as the water shrew, is a relatively large shrew, up to 10 cm (4 in) long, with a tail up to three-quarters as long again. It has short, dark fur, often with a few white tufts, a white belly, and a few stiff hairs around the feet and tail.
Shrews need to consume 200% to 300% of their body weight in food each day in order to survive; to achieve this they must eat every 2 to 3 hours, and they will starve if they go without food much longer than that. They do not hibernate because their bodies are too small to store sufficient fat reserves and they have a short fasting duration. [5] [7]
During the reproductive season, food consumption is greatest. [13] They also eat plants. Compared to other shrews in the genus Sorex, Trowbridge's shrews eat more vegetable matter. [1] During winter months, they may feed on conifer seeds, such as Douglas-fir and pine, as well as other plant seeds. [12]
The shrew subfamily Soricinae consists of thirteen genera.The majority of the species are contained within Cryptotis, with 41 species, and Sorex, with 76 species.The remaining shrews are split between Chodsigoa with eight species; Chimarrogale with six; Anourosorex, Episoriculus, Neomys, and Notiosorex with four species each; Blarina and Blarinella with three species each, and Megasorex ...
The Glacier Bay water shrew (Sorex alaskanus) is a species of mammal in the family Soricidae. It is endemic to Alaska in the United States. [1] It can swim underwater, and when it stops swimming, air trapped in its fur lets it float back up to the surface. Owing to small hairs on its feet, the water shrew can run across the water.
Water shrew may refer to any of several species of semiaquatic red-toothed shrews: Asiatic water shrews (Chimarrogale spp.) Malayan water shrew (C. hantu) Himalayan water shrew (C. himalayica) Sunda water shrew (C. phaeura) Japanese water shrew (C. platycephala) Chinese water shrew (C. styani) Sumatran water shrew (C. sumatrana) Nectogale
With air trapped in its fur for buoyancy, marsh shrews can run for three to five seconds on top of the water. It measures about 16 cm (6.3 in) in length, including a 7-centimetre (2.8 in)-long tail, and weighs an average of 14.5–16 g (0.51–0.56 oz).