ELI5: Explain Like I'm 5

Fossil birds

Have you ever heard of fossils? Fossils are like old bones or traces of animals that used to live a long, long time ago. Some of these fossils belong to birds that lived millions of years ago!

Fossil birds are also known as avian fossils. They are the preserved remains of birds that lived in ancient times, before humans existed. Scientists dig up these fossils from the ground and study them to understand what these birds were like.

Fossil birds are different from modern birds we see today. These ancient birds might have looked very strange compared to birds today. For example, some of them might have had teeth, which is not something that modern birds have.

There are many different kinds of fossil birds. Some of them might have been giant, like the ostriches we see today. Others might have been small, like tiny little hummingbirds. There were even bird-like creatures called dinosaurs that lived a long time ago!

Scientists can learn a lot from studying fossils. They can determine what these ancient birds ate, what kind of habitats they lived in, and even how they flew. So, the next time you see a bird outside, remember that there were once many different kinds of birds that lived millions of years ago, and we can learn all about them through the fossils they left behind!