Animalia > Chordata > Mammalia > Soricomorpha > Soricidae > Cryptotis > Cryptotis nelsoni

Cryptotis nelsoni (Nelson's Small-eared Shrew)

Wikipedia Abstract

Nelson's small-eared shrew (Cryptotis nelsoni) is a species of mammal in the family Soricidae. It is endemic to eastern Mexico. The species was discovered by Edward William Nelson and Edward Alphonso Goldman in 1894, who collected a number of specimens from the slopes of the San Martín volcano in Veracruz, Mexico. The species was then not recorded again, and thought by many to be extinct, until being rediscovered in the same area in 2004 (as described in 2009). Its biology is essentially unknown.
View Wikipedia Record: Cryptotis nelsoni

Endangered Species

Status: Critically Endangered
View IUCN Record: Cryptotis nelsoni

EDGE Analysis

This medium-sized shrew is thought to be endemic to the forested slopes of a small volcano in southern Mexico. It was discovered in 1894, but not seen again for more than a century, leading researchers to fear it had gone extinct. However, in 2003, two researchers set out to search for the species in the same region from which it was first discovered. Their expedition met with success, and they found three individuals in the vicinity of the type locality. Although good news for the species, the researchers discovered that the species’ tiny range is under pressure from human activities, including logging, cattle grazing, induced fires and agriculture. Urgent conservation action is needed if this Critically Endangered shrew is to survive.
Uniqueness Scale: Similiar (0) 
 Unique (100)
Uniqueness & Vulnerability Scale: Similiar & Secure (0) 
 Unique & Vulnerable (100)
ED Score: 9.45
EDGE Score: 5.12
View EDGE Record: Cryptotis nelsoni


Adult Weight [1]  7 grams
Forages - Ground [2]  100 %
Litter Size [1]  3
Nocturnal [2]  Yes
Snout to Vent Length [1]  3.15 inches (8 cm)
Top 100 Endangered [3]  Yes

Protected Areas

Name IUCN Category Area acres Location Species Website Climate Land Use
Los Tuxtlas Biosphere Reserve 383315 Veracruz, Mexico    

Alliance for Zero Extinction (AZE) Sites

Name  Location   Map   Climate   Land Use 
Los Tuxtlas Mexico      

Range Map


External References



Attributes / relations provided by
1Nathan P. Myhrvold, Elita Baldridge, Benjamin Chan, Dhileep Sivam, Daniel L. Freeman, and S. K. Morgan Ernest. 2015. An amniote life-history database to perform comparative analyses with birds, mammals, and reptiles. Ecology 96:3109
2Hamish Wilman, Jonathan Belmaker, Jennifer Simpson, Carolina de la Rosa, Marcelo M. Rivadeneira, and Walter Jetz. 2014. EltonTraits 1.0: Species-level foraging attributes of the world's birds and mammals. Ecology 95:2027
3Baillie, J.E.M. & Butcher, E. R. (2012) Priceless or Worthless? The world’s most threatened species. Zoological Society of London, United Kingdom.
Protected Areas provided by Le Saout, S., Hoffmann, M., Shi, Y., Hughes, A., Bernard, C., Brooks, T.M., Bertzky, B., Butchart, S.H.M., Stuart, S.N., Badman, T. & Rodrigues, A.S.L. (2013) Protected areas and effective biodiversity conservation. Science, 342, 803–805
AZE sites provided by Alliance for Zero Extinction (2010). 2010 AZE Update.
Abstract provided by DBpedia licensed under a Creative Commons License