How Do Earthworms Move Without Legs?

July 7, 2026

Have you ever watched an earthworm and wondered, "How does it move if it doesn't have any legs?"

Many children assume animals need legs to crawl. Earthworms are fascinating, teaching children that nature has many different ways of moving.

Instead of rushing to explain the answer, encourage your child to become a careful observer.

Watch Before You Explain

The next time you find an earthworm, spend one minute simply watching.

Ask your child,

-"What do you notice?"

-"Does the whole body move together?"

-"Does one end stretch first?"

-"Can you see the body becoming longer and then shorter again?"

Children are often amazed when they realize the worm is not simply sliding across the ground. It is using a very clever way of moving.

Earthworms Stretch and Squeeze

Earthworms move by stretching the front of their body forward and then pulling the rest of their body behind them. Their bodies contain two different layers of muscles that work together:

1. One set of muscles stretches the body longer and thinner.

2. Another set shortens the body and makes it wider.

This repeated stretching and squeezing allows the earthworm to slowly travel through the soil.

Watch closely and you will notice this pattern happening over and over again:

Stretch....Grip....Pull...and Repeat!

Tiny Bristles Help Them Grip the Ground

Earthworms have thousands of tiny bristles called setae.

These bristles are so small that you usually cannot see them without magnification. The setae act like tiny anchors. As the worm stretches forward, the bristles grip the soil so the body does not slide backward.

Without these tiny bristles, the worm would have difficulty moving through the ground.

A Fun Observation Challenge

Invite your child to become a nature detective:

-Can you figure out which end moves first?

-Can you count how many times the worm stretches in thirty seconds?

-Does it move differently on wet soil than on dry pavement?

-Can you see it disappear underground?

There are no wrong observations. The goal is to slow down and notice.

Why Earthworms Move This Way

Earthworms spend most of their lives underground. Having long legs would actually make tunneling through soil much more difficult.

Their flexible bodies allow them to squeeze through tiny spaces between rocks, roots, and soil particles.

This special way of moving helps them create tunnels that improve the soil for plants. Every movement the worm makes is helping forests, gardens, and parks stay healthy.

Try This With Your Child

Place a piece of string next to the earthworm.

Ask your child, "Which one stretches longer?"

Watch as the worm changes length while it moves. Most children are surprised to discover that an earthworm's body can become much longer and then much shorter within seconds.

Simple comparisons like this help children observe movement instead of simply hearing about it.

What Your Child Is Learning

Children are learning to slow down, to notice patterns and asking questions before expecting answers. These observation skills help children in science, reading, art, and everyday problem solving.

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.

Continue Learning:

Back to blog

Item added to your cart