[laughs]

Uh, but sometimes also the opposite happens.

Scientists thought that were two birds were the same species, but then they looked at their DNA and then they realized that those birds are actually different from each other, and that's what's called a split.

And in 2025, for example, scientists agreed to split the warbling vireo into two species, the eastern warbling vireo and the western warbling vireo, so now there's two species that were originally one.

And sometimes even the opposite of that occurs.

Two birds that were thought to be different species get lumped together.

So they've looked at their DNA again and in 2024 there were two species of what's called a red poll, that's like a finch, and they were lumped into a single species called the red poll.

[laughs]