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Chris Mensing

👤 Person
74 appearances

Podcast Appearances

Radiolab
Weighing Good Intentions

You're listening to Radiolab.

Radiolab
Weighing Good Intentions

Want to go in?

Radiolab
Weighing Good Intentions

It's not doing anything good.

Radiolab
Weighing Good Intentions

It's a parasite.

Radiolab
Weighing Good Intentions

Fish and wildlife biologist with the U.S.

Radiolab
Weighing Good Intentions

Fish and Wildlife Service.

Radiolab
Weighing Good Intentions

It looks like we've got six males and one female.

Radiolab
Weighing Good Intentions

Let me grab a couple.

Radiolab
Weighing Good Intentions

Can I touch them?

Radiolab
Weighing Good Intentions

Yeah, go ahead.

Radiolab
Weighing Good Intentions

What do they look like?

Radiolab
Weighing Good Intentions

It has a very drab body, very dull.

Radiolab
Weighing Good Intentions

And the timing is such that the cowbird egg will hatch first.

Radiolab
Weighing Good Intentions

and will double its size in 24 hours.

Radiolab
Weighing Good Intentions

So by the time that the host birds hatch, that cowbird may be up to four times the size.

Radiolab
Weighing Good Intentions

And when they start begging for food from their parents, the loudest, the most aggressive chick is going to get fed.

Radiolab
Weighing Good Intentions

The cowbird chick.

Radiolab
Weighing Good Intentions

In the late 1800s, early 1900s.

Radiolab
Weighing Good Intentions

The warbler population just started plummeting.

Radiolab
Weighing Good Intentions

This huge drop.

Radiolab
Weighing Good Intentions

There were only 200 males.

Radiolab
Weighing Good Intentions

On Earth.

Radiolab
Weighing Good Intentions

Exactly.

Radiolab
Weighing Good Intentions

This is one of 54 traps.

Radiolab
Weighing Good Intentions

It's a new one that we just built this year.

Radiolab
Weighing Good Intentions

Yeah, she'd bite me.

Radiolab
Weighing Good Intentions

Just like anyone, if you had someone larger grabbing you, they don't appreciate it too much.

Radiolab
Weighing Good Intentions

I kind of do, yeah.

Radiolab
Weighing Good Intentions

Thoracic compression is the term we use.

Radiolab
Weighing Good Intentions

We basically squeeze the bird, suffocating it, preventing it from breathing.

Radiolab
Weighing Good Intentions

Yeah, this ecosystem is a fire ecosystem.

Radiolab
Weighing Good Intentions

Says Chris.

Radiolab
Weighing Good Intentions

It burns.

Radiolab
Weighing Good Intentions

It is a fire ecosystem.

Radiolab
Weighing Good Intentions

It is made to burn.

Radiolab
Weighing Good Intentions

You know, if you look at a population graph... That's Chris Mensing again.

Radiolab
Weighing Good Intentions

After that Mack Lake burn, the population went like that.

Radiolab
Weighing Good Intentions

They ask you, when are you done?

Radiolab
Weighing Good Intentions

And we really say, never.

Radiolab
Weighing Good Intentions

If we let things be, the bird would be extinct.

Radiolab
Weighing Good Intentions

That's the hard thing about this job, is knowing that we're never done.

Radiolab
Weighing Good Intentions

You're probably looking at hundreds of people.

Radiolab
Weighing Good Intentions

Dollars, we could be looking at well over a million dollars a year spent.

Radiolab
Weighing Good Intentions

We're going to kind of walk through the middle of these transects.

Radiolab
Weighing Good Intentions

We're going to come up.

Radiolab
Weighing Good Intentions

20 to 7 right now.

Radiolab
Weighing Good Intentions

The sun's just coming up, and it's getting a little muggy out here.

Radiolab
Weighing Good Intentions

That was a Kirtland's.

Radiolab
Weighing Good Intentions

But I'm not going to mark him in because I don't know exactly where he's at.

Radiolab
Weighing Good Intentions

No, no, no.

Radiolab
Weighing Good Intentions

We want to be a lot more accurate than just to say we know there's one up there.

Radiolab
Weighing Good Intentions

We want to triangulate him.

Radiolab
Weighing Good Intentions

956 and all's well in the warbler woods.

Radiolab
Weighing Good Intentions

1045 a.m.

Radiolab
Weighing Good Intentions

I know that there's a bird out there.

Radiolab
Weighing Good Intentions

I can still hear that bird way back there.

Radiolab
Weighing Good Intentions

Well, we do it because we should.

Radiolab
Weighing Good Intentions

You know, we're stewards of the land.

Radiolab
Weighing Good Intentions

That's Chris Mensing again, cowbird killer.

Radiolab
Weighing Good Intentions

It's for future generations.

Radiolab
Weighing Good Intentions

Now, three decades later... I say you keep that little bird going.

Radiolab
Weighing Good Intentions

Exactly.

Radiolab
Weighing Good Intentions

Thank God for Teddy Roosevelt and the boys that made our national parks.

Radiolab
Weighing Good Intentions

Imagine what if we didn't have those?

Radiolab
Weighing Good Intentions

It costs money, it's painful, blah, blah, blah.

Radiolab
Weighing Good Intentions

You gotta have the guts to do that.

Radiolab
Weighing Good Intentions

And Jim was really that kind of guy.