- Sorex hoyi
- Soricomorpha - Soricidae
The smallest American mammal by weight
, weighing in at only 2 to 4g. These shrews are approximately 80 to 91 mm in total length. The tail accounts for approximately 1/3 of that length at 27 to 32 mm. The head is narrow, the nose pointed, and there are obvious whiskers
. The eyes are inconspicous, being covered by short, soft fur. Dorsal coloration varies from gray-brown in the summer to gray in the winter. The underparts are a lighter gray. The dental formula is: 3/1, 1/1, 3/1, 3/3= 32.