Book 31, Question 14 · Video
Why do birds have scaly legs?
A bird’s legs and feet are covered in scales made of keratin, the same material as your fingernails. The scales protect the skin from scratches, rough bark, and water. They are a clue to the bird’s family history, because birds are distant cousins of reptiles. Only the legs and feet have scales. The rest of the body is covered with feathers.
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What Crafty Clover says in this video
Intro
Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. Why do birds have scaly legs?
The Big Idea
Look closely at a bird's feet. They are covered in scales! Why do birds have scaly legs?
Keratin Scales
Step one: Keratin Scales. A bird's legs and feet are covered in scales made of keratin. That's the same material as your fingernails.
Protection
Step two: Protection. The scales protect the skin from scratches, rough bark, and water. They make tough, flexible armor for feet that walk, perch, and wade.
A Family Clue
Step three: A Family Clue. The scales are a clue to the bird's family history. Birds are distant cousins of reptiles. Only the legs and feet have scales, and the rest of the body has feathers.
A Closer Look
Let's take a closer look! On legs and feet. Like fingernails. Everywhere else. Distant cousins.
Quick Facts
Quick facts! A chicken's scaly legs show the reptile link clearly. Keratin makes your nails too. Birds are distant cousins of reptiles. Scales guard the skin.
Think Like a Scientist
Now, think like a scientist! Look at a photo of a chicken, pigeon, or eagle's feet. Notice the rows of scales on the toes and legs. Now look at a picture of a lizard. Compare the two kinds of scales. Draw what is the same and what is different.
Outro
A bird's legs and feet are covered in tough scales made of keratin, like your fingernails. They protect the skin from scratches and water and are a clue that birds are distant cousins of reptiles. Science is amazing! The world is full of surprises. Keep asking big questions, and keep exploring with me! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!