Why Do Some Animals See Well at Night?

What Crafty Clover says in this video

Intro

Hi! I'm Crafty Clover! Let's discover something amazing. Why do some animals see well at night?

The Big Idea

Night hunters pack extra tools into their eyes. A wide pupil lets in more light, and special cells called rods catch dim light. Many also have a mirror layer that gives light a second chance to be seen.

Dusk Falls

Step one: dusk falls. As the sun sets, there is much less light to see by. A night hunter's eyes get ready.

The Pupil Opens Wide

Step two: the pupil opens wide. A big pupil lets more light into the eye. It is like opening the curtains all the way.

Rods and a Mirror

Step three: rods catch the light and a mirror bounces it. Rod cells work well in dim light, and a mirror layer called the tapetum sends leftover light back for a second try. The hunter can now spot a moving mouse that looks invisible to you.

A Closer Look

Let's take a closer look at a night eye! A wide pupil opens to let in more light. Rods are cells that catch dim light. The tapetum bounces light for a second chance. And starlight is enough light for a night hunter!

Quick Facts

Quick facts! Do not shine a bright beam into a hunter's face for fun. Your own eyes need several minutes to adapt to the dark. An owl can hunt in the day too, but every tool has a trade-off, such as weaker color vision. A grown-up carries the light on the trail.

Think Like a Scientist

Now, think like a scientist! Sit in a dim room with a grown-up. Sit in a dim room for two minutes. What appeared that you missed at first? Which tool is your eye using? Never leave the path just to test your night eyes.

Outro

Night eyes show us that animals are built for the time they are awake. Science is amazing! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!