Nelson's small-eared shrew (Cryptotis nelsoni) is a species of mammal in the family Soricidae.

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 the Mexican state of Veracruz.

The Nelson's Small-Eared Shrew is considered to be one of the world's 100 most threatened species on the planet.

They live in high altitudes on the side of an inactive volcano.

[1][2] The shrews are tiny (only 10 centimetres long) with brown fur.