Egg
A hard-shelled object that a baby bird or reptile grows inside before it hatches.
What is it?
An egg is a structure that contains a developing embryo. Birds, reptiles, and some mammals lay eggs. The shell protects the baby inside. The yolk provides food. The Elegant Crested Tinamou lays eggs that are bright emerald green and smooth like porcelain. The color helps them hide in the grass.
Why it matters
Eggs are important for the survival of many species. They come in many colors and sizes. Studying eggs helps scientists understand animal behavior and evolution.
Where you've seen it
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