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The northern short-tailed shrew (Blarina brevicauda) is the largest shrew in the genus Blarina, [3] and occurs in the northeastern region of North America. [4] It is a semifossorial, highly active, and voracious insectivore and is present in a variety of habitats like broadleaved and pine forests among shrubs and hedges as well as grassy river banks. [5]
The American water shrew or northern water shrew (Sorex palustris) is a shrew found in the nearctic faunal region located throughout the mountain ranges of the northern United States and in Canada and Alaska. [3] The organism resides in semi-aquatic habitats, [4] and is known for being the smallest mammalian diver. [5]
The North American least shrew will also sometimes live inside beehives and eat all the larvae. It will often share its food with other shrews. It eats more than its body weight each day and is known to store food. [4] [7] The North American least shrew makes its home in burrows or shallow runways under flat stones or fallen logs.
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 long-tailed shrew has an unusually limited geographic range. The species can be found in the Appalachian Mountains, Nova Scotia, and Southeastern New Brunswick, from Canada southward along the mountains to North Carolina, and small ranges of the species in Tennessee. In New York, the long-tailed shrew is found in the Adirondacks and Catskills.
The shrew has to eat almost constantly, because they can only survive a few hours without food. [7] Their metabolism drops when they are at rest. McCay and colleagues (1997) found a higher abundance of masked shrews in non-irrigated forests due to a higher availability of larval insects, which is the preferred food source of the masked shrew.
The smoky shrew (Sorex fumeus) is a medium-sized North American shrew found in eastern Canada and the northeastern United States and extends further south along the Appalachian Mountains. U.S. Forest Service image
The ornate shrew is found along portions of the west coast of North America and a few near shore islands. The northern extent is around 39 degrees latitude in California. The range extends south into the Baja California peninsula. There is a stretch of territory through Baja where the shrew is not found, then it is found again near the southern ...