Which Is the Smallest Mammal in the World?

Discover the smallest mammal in the world the bumblebee bat. Learn where it lives, how tiny it really is, and why this rare species is so fascinating and important for nature.

Jun 12, 2025, 17:30 IST
bumblebee bat
bumblebee bat

Smallest Mammal in the World: When we think of mammals, we often imagine animals like lions, elephants, or even humans. But not all mammals are big or furry. In fact, the smallest mammal in the world is so tiny it can fit on your fingertip. It’s called the bumblebee bat, also known as Kitti’s hog-nosed bat, and it’s found only in small parts of Thailand and Myanmar.

Where Is the Smallest Mammal Found?

The bumblebee bat lives in limestone caves near rivers in western Thailand and southeastern Myanmar. These bats prefer warm, humid areas and spend most of their day sleeping in caves, coming out only at dusk to feed on tiny insects. Because of their limited range and small population, they are classified as vulnerable and are rarely seen in the wild.

 

Read More: What Is the Largest Living Organism on Earth?

How Small Is the Bumblebee Bat?

This tiny bat measures just 29 to 33 millimetres (about 1.1 to 1.3 inches) in length, about the size of a large bumblebee, which is where it gets its name. It weighs only about 2 grams, roughly the same as a small coin. While it is the smallest mammal by skull size and length, the Etruscan shrew is considered the smallest by weight (around 1.8 grams). Still, the bumblebee bat holds the title overall due to its tiny dimensions and flight ability.

Why Is It So Special?

The bumblebee bat is a rare and unique creature. Despite its size, it is a fully functional flying mammal with wings that help it hunt for insects in midair. It uses echolocation to navigate and catch prey in the dark, just like larger bats. Scientists are especially interested in it because it helps us understand the extremes of mammalian size and adaptation.

Fun Facts About the Bumblebee Bat

Fits on Your Fingertip

The bumblebee bat is so small it can comfortably sit on a human fingertip. Its tiny size makes it look more like an insect than a mammal at first glance.

Named After a Pig’s Nose

Its scientific name, Craseonycteris thonglongyai, comes from its pig-like snout. That’s why it’s also called the hog-nosed bat.

Limited Habitat Range

These bats are only found in a few caves in Thailand and Myanmar. Conservation efforts are important because their natural habitats are shrinking due to tourism and land use.

Tiny But Mighty Flyer

Despite its size, the bumblebee bat is a skilled flyer. It flaps its wings rapidly to hover and dart through the air, much like a hummingbird.

Not the Lightest, But the Smallest

While the Etruscan shrew may weigh a bit less, the bumblebee bat is the smallest in length. That makes it the smallest true mammal when both size and flight are considered.

Jasreet Kaur
Jasreet Kaur

Content Writer

Jasreet Kaur is a journalist with over two years of experience and a bachelor's degree in journalism and mass communication. Driven and committed, she writes on current affairs and general knowledge, fueled by a desire to see positive growth in organizations, society, and the world.

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