Emily Kwong (host, with guest Nell Greenfield‑Boyce also speaking within these segments)

And that is glass.

Have you ever heard a bird hit a window?

I have, and my heart drops every time I hear it.

It's horrible, right?

It's like a sickening thunk.

And it turns out glass is one of the biggest dangers for migrating birds.

Researchers estimate that every year in the U.S., collisions with windows take out at least a billion birds.

A

Billion.

That's a lot of birds.

Right.

And migration season is when the numbers of collisions tend to spike.

I mean, during this time of year, there are actually whole teams of people across the country that are waking up early every morning and going out and looking.

for collision victims that have been injured or are dead.

I'm glad someone is looking out for these birds in this way.

Where are volunteers doing that?

So we're talking places like Dallas, Chicago, Philadelphia, San Diego, and then in the nation's capital, Washington, D.C., where I live.

I mean, that's where a volunteer named Stephanie Haley found this poor little guy huddled on the sidewalk next to an office building.

That's an Acadian flycatcher, this little olive green bird that migrates to Central and South America.

I mean, she picked it up and they put it in like this brown paper bag.