Smallest mammal
Craseonycteris thonglongyai, Bumblebee bat, Kitti's hog-nosed bat
29 - 33/1.7 - 2 dimension(s)
Thailand ()

The smallest mammal in the world is the bumblebee bat or Kitti's hog-nosed bat (Craseonycteris thonglongyai), with a body no bigger than a large bumble-bee. It has a head-body length of only 29-33 mm (1.14-1.29 in), a wingspan of approximately 130-145 mm (5.1-5.7 in), and a weight of 1.7-2 g (0.05-0.07 oz). The tiny bat can be found only in a few select limestone caves on the Khwae Noi River, Kanchanaburi Province, south-west Thailand.

The smallest non-flyng mammal is Savi's white-toothed pygmy shrew, also called the Etruscan shrew (Suncus etruscus), which has a head and body length of 35-48 mm (1.3-1.8 in), a tail length of 25-30 mm (0.98-1.17 in) and weighs 1.5-2.5 g (0.05-0.09 oz). It is found along the Mediterranean coast and southwards to Western Cape province, South Africa.

Kitti's hog-nosed bat is 80 million times lighter than the largest mammal, the blue whale (Balaenoptera musculus)!