Do Birds Really Have a Built-In Compass?

What Crafty Clover says in this video

Intro

Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. Do birds really have a built-in compass?

The Big Idea

Every year, many birds fly thousands of miles to warmer places and then back again. They do not use maps or GPS. Do birds really have a built-in compass? Let's find out!

Sensing the Field

Step one: sensing the field. Many migrating birds seem to sense Earth's magnetic field. Scientists have two main ideas about how.

Two Big Ideas

Step two: two big ideas. One idea is that special light-sensitive molecules in a bird's eyes may react to the field, so the bird might see it as a pattern. Another idea is that tiny bits of magnetite in the head help.

Many Clues

Step three: many clues. Birds also use the Sun, stars, and landmarks. They combine all these clues to find their way.

A Closer Look

Let's take a closer look! Eyes may react to the field. Magnetite may help in the head. The Sun and stars guide birds too. Landmarks help as well.

Quick Facts

Quick facts! Scientists are still working out exactly how bird magnetic sense works. One idea uses special molecules in the eyes. Another idea uses tiny bits of magnetite. Birds use many clues together.

Think Like a Scientist

Now, think like a scientist! List three clues a migrating bird could use to find its way. One should come from the sky. One should come from the ground. One should come from Earth's magnet. Write down what you notice, and share it with a grown-up.

Outro

Many birds seem to sense Earth's magnetic field, and they also use the Sun, stars, and landmarks. Science is amazing! Stay curious! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!