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American pygmy shrew
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== Physiology == Due to its high [[metabolism]], the pygmy shrew is active year-round and does not engage in any form of [[torpor]] or [[hibernation]]. Shrews have been known to burrow through snow to find food, showing that winter snow does not stop them. Though pygmy shrews are constantly losing body heat due to their small size, their small size also has benefits, as they require less food to generate sufficient energy than would a larger shrew.<ref name="WhyAreShrewsSoSmall" /> Although usually a positive correlation exists between [[latitude]] and shrew body size, the American pygmy shrew is an exception.<ref name="WhyAreShrewsSoSmall" />
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