What is the lightest species of mammal?

Answer 1

The Etruscan shrew shares the title of world's smallest mammal with a fascinating creature from Thailand: Kitti's hog-nosed bat, also known as the bumblebee bat. It gets its nickname from its size - barely over an inch long -which makes it about the size of a large bumblebee!

Answer 2

The Etruscan shrew shares the title of worlds.

Answer 3

The Etruscan shrew is not the smallest, but can be the lightest, with adults weighing an average of just 1.3 grams (1/30th of an ounce) and only about 5 cm long, but with a 3 cm tail as well.