Fog shrew

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Fog shrew
Scientific classification edit
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Eulipotyphla
Family: Soricidae
Genus: Sorex
S. sonomae
Binomial name
Sorex sonomae
Jackson, 1921
Fog Shrew area.png
Fog Shrew range

The fog shrew (Sorex sonomae) is a species of mammal in the family Soricidae. It is endemic to northern California and Oregon in the United States.[1]


S. sonomae is categorized as the "largest" shrew found on the "Pacific Coast" of the United States.[2] It is recognized by its "reddish, light-brown" fur and a tail that "is almost ly colored."[3] Some information is available on the fog shrew's dentition; however, there is no citable reference for the dental formula. One paper has found the dental formula of the fog shrew to be (x 2 = 32 total teeth), but there is debate in the academic community.[4] A conservative estimate has an adult fog shrew ranging in total length from 120-158mm,[3] but has been observed to have a wider range in total length (105-180mm).[5] The weight range for the fog shrew has varies in different sources, but fall within the range of 5.5-18g.[3][5]

Habitat and Range[edit]

The fog shrew is found in areas of "chaparral, coastal coniferous forests, and marshy areas."[6][3] The areas in which individuals live tend to be moist environments. This includes being near creeks and on the forest floor under fallen trees and other debris.[3][6]

The southern most range of S. sonomae is Marin County near the city of Sonoma in California and range north to the "central coast of Oregon."[3] They tend to stay closer to the coast and not move far inland unless they are near a body of water.


Like most shrews, S. sonomae is an insectivore.[3] The fog shrew's diet consists mainly of "centipedes and spiders", but has also been known to eat "slugs and snails."[3]


  1. ^ a b Hammerson, G. (2008). "Sorex sonomae". IUCN Red List of Threatened Species. IUCN. 2008. Retrieved 9 February 2010.
  2. ^ "Fog Shrew - Sorex sonomae - Overview - Encyclopedia of Life". Encyclopedia of Life. Retrieved 2017-12-04.
  3. ^ a b c d e f g h 1921-, Jameson, E. W. (Everett Williams) (2004). Mammals of California. Peeters, Hans J., Jameson, E. W. (Everett Williams), 1921- (Rev. ed.). Berkeley: University of California Press. ISBN 9780520235823. OCLC 52942735.
  4. ^ Hutterer, Rainer (December 2017). "Homology of unicuspids and tooth nomenclature in shrews". Special Publication of the International Society of Shrew Biologists. 1: 397–404.
  5. ^ a b "North American Mammals: Sorex sonomae : Species Information". Retrieved 2017-12-04.
  6. ^ a b "Sorex sonomae (Fog Shrew)". IUCN Red List of Threatened Species. IUCN. Retrieved 2017-12-04.