15 Fascinating Earthworm Facts for Curious Kids

July 7, 2026

Earthworms may not look exciting at first, but they are some of the most amazing animals living beneath our feet! The next time your child finds an earthworm, share one or two of these fascinating facts.

1. Earthworms Have No Eyes

Earthworms cannot see like we can. Instead, they have light sensitive cells in their skin that help them detect light and darkness. That is why they quickly move away from bright sunlight.

Try This

Ask your child, "Which way do you think the worm will move if we gently make a shadow?"

Watch together.

2. Earthworms Have No Bones

An earthworm's body is supported entirely by muscles and fluid inside its body.

This allows it to squeeze through tiny spaces underground.

Ask your child: "Could you fit through a tunnel as small as a worm?"

3. Earthworms Breathe Through Their Skin

Earthworms do not have lungs. Their moist skin allows oxygen to move into their bodies.

If their skin dries out, they cannot breathe. That is one reason they spend most of their lives underground.

4. Earthworms Are Nature's Recyclers

Earthworms eat dead leaves and other decaying plants. As they digest this material, they return nutrients to the soil that help plants grow. Without earthworms, forests and gardens would look very different.

5. Earthworms Build Underground Tunnels

As worms move through the soil, they create tiny tunnels. These tunnels help water soak into the ground and allow air to reach plant roots. Healthy soil depends on millions of these tiny workers.

6. Earthworms Can Stretch Much Longer Than They Look

Watch an earthworm carefully. It stretches long, then pulls itself short again.

Ask your child: "Can you stretch like a worm?"

7. Earthworms Have Tiny Bristles

Although you usually cannot see them, tiny bristles called setae help earthworms grip the soil. Without them, worms would slide backward every time they stretched.

8. Some Earthworms Live For Several Years

Many earthworms live between four and eight years if conditions are good and they avoid predators.

9. Birds Love Earthworms

Robins, crows, thrushes, toads, turtles, snakes, moles, and many other animals depend on earthworms for food. Finding a worm often means another animal may not be far away.

Ask: "Who do you think might be looking for this worm?"

10. Earthworms Have Five Hearts

Instead of one heart, earthworms have five pairs of muscular arches that pump blood through their bodies. Children are usually amazed by this fact!

11. Earthworms Can Sense Vibrations

Earthworms cannot hear like people. Instead, they detect vibrations moving through the soil. These vibrations help warn them of danger.

12. Earthworms Prefer Moist Soil

Earthworms lose water through their skin. That is why they stay underground during hot, dry weather and become much easier to find after rain.

13. Every Earthworm Helps Your Garden

Even one earthworm improves soil by mixing organic matter and creating tunnels.

Imagine what thousands of worms are doing beneath your feet.

14. Earthworms Can Replace Their Teeth... Because They Don't Have Any!

Earthworms have no teeth. Instead, they swallow tiny pieces of soil, dead leaves, and other decaying plants. Inside a muscular part of their digestive system called the gizzard, tiny grains of sand and soil grind the food into smaller pieces, much like our teeth chew food.

Ask your child: "If worms don't have teeth, how do you think they chew their food?"

15. One Acre of Healthy Soil Can Contain More Than One Million Earthworms

Healthy forests, gardens, and fields can have hundreds of thousands to more than one million earthworms living beneath a single acre of land, depending on the soil and habitat. Even though you only see one or two on the surface, there are often many more underground helping improve the soil.

Ask your child: "How many worms do you think are hiding under our feet right now?"

Try This Together:

The next time you find an earthworm, ask your child: "Which fact surprised you the most?"

Then ask: "What else do you wonder about worms?"

The best nature walks rarely end with answers. They begin with questions.

About Little Hikers Long Island

Little Hikers Long Island is a fully outdoor parent and child nature program at West Hills County Park in Huntington, New York. Through hands-on exploration, families learn about the local plants, insects, animals, and seasonal changes found right here on Long Island. Children learn to observe closely, ask thoughtful questions, compare what they see, and build a lasting relationship with the natural world around them.

Our goal is to help children become careful observers, confident explorers, and future stewards of the places they call home, because children protect what they understand.

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