ELI5: Explain Like I'm 5

Brown-headed cowbird

Have you ever heard of a bird called the brown-headed cowbird, little one? It's a very interesting bird that often lays its eggs in the nests of other birds instead of building its own.

Now you might be wondering, why does the cowbird do that? Well, it's because cowbirds are what we call "brood parasites". That means they rely on other birds to take care of their babies instead of doing it themselves.

So how does the cowbird lay its eggs in another bird's nest? You see, cowbirds are very sneaky. They watch other birds build their nests and when the other bird isn't looking, the cowbird will quickly sneak in and lay an egg in the nest. The cowbird will often choose a nest with eggs that look similar to its own eggs so that the other bird won't notice the difference.

Once the cowbird's egg hatches, the baby cowbird will be raised by the other birds in the nest. This might not seem fair, but cowbirds have been doing this for a long time and it's just a part of their nature.

So, there you have it, little one. The brown-headed cowbird is a bird that lays its eggs in other bird's nests so that other birds can take care of its babies. It might seem a little strange, but it's just a part of how these birds have evolved to survive.