Sorex (Otisorex) haydeni Baird 1857

Wilson, Don E. & Reeder, DeeAnn, 2005, Order Soricomorpha, Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 1, Baltimore: The Johns Hopkins University Press, pp. 220-311 : 288

Sorex (Otisorex) haydeni Baird 1857

Sorex (Otisorex) haydeni Baird 1857 , Mammalia, in: Repts. U. S. Expl. Surv., Vol. 8, 1: 29.

Type Locality: USA, "Fort Union, Nebraska " (later Fort Buford, now Mondak, Montana, near Buford, Williams Co., North Dakota).

Vernacular Names: Prairie Shrew.

Distribution: SE Alberta, S Saskatchewan, SW Manitoba ( Canada); NW Montana southeast to Kansas, east to W and S Minnesota ( USA).

Conservation: IUCN – Lower Risk (lc).

Discussion: Subgenus Otisorex ; S. cinereus group ( Demboski and Cook, 2003). Karyotype has 2n = 64, FN = 66. Formerly included in but now separated from cinereus by van Zyll de Jong (1980) and Junge and Hoffmann (1981); both species are closely related ( George, 1988). S. haydeni occurs in grassy habitats while S. cinereus prefers forest and woodland ( van Zyll de Jong, 1980). In Minnesota, Stewart and Baker (1994, 1997) and Brunet et al. (2002) found evidence of introgression between haydeni and cinereus .