Hi, it's Jen White. Before we start the show, I want to take a moment to thank you, our 1A listeners,

and anyone listening who donates to public media. After all, public media means that you, the public, supported.

Everything you hear from the NPR Network really does depend on your contributions.

And for anyone listening who isn't a supporter yet, right now is a great time to get actively involved in creating a more informed public.

That's our whole mission at NPR. That's why we're here.

With 1A, you're part of the conversation. Your donation helps 1A bring you not only conversations that matter,

but also stories, guests, and surprises that lift you up. To help this work keep going,

please make a tax deductible donation to your favorite station or stations in the NPR network.

What really matters is that you're part of the community that makes this work possible.

Listener support is a powerful resource.

It takes all of us doing what we can, when we can, to keep this free public service going.

So please give today at donate. npr.org slash 1A. Thanks. What do bison, beavers, wolves and sea otters all have in common?

They're keystone species. That means they have an outsized impact on their ecosystem.

It takes humans driving some of these animals to near extinction to realize just how important they are.

We've spent decades since then, reintroducing endangered species into their original habitats, sometimes using very interesting techniques.

Every summer for years past, Idaho Beaver have been on the move in this manner.

Countless numbers have been supplied for streams and lakes to bring the beaver population back to its former position.

Ear tags are attached for future information.

The drop crates are loaded into the airplane.

Parachutes are attached to cargo lines.

10 boxes to a load, 20 beaver ready for the flight to Mountain Meadows.

Now into the air and down they swing, down to the ground near a stream or a lake.

...