It's laced into carrot chunks in cereal, and it's intended to kill every wild mammal with teeth instead of a beak and for instead of feathers.

Scientists believe that New Zealand has no native land mammals that only birds in a couple species of bats existed there.

When humans arrived, some birds were apparently hunted to extinction.

Others were decimated by animals like rats that arrived on ships.

So the government wants to get rid of its predators.

What's this guy?

This is a pretty special opportunity.

This is Takahide.

They were only rediscovered high in the mountains in Fiordland in 1948 and get one of our most endangered birds.

There's only 280 left on the planet, and it's not just the birds on the brink here.

The tuatara is New Zealand's most iconic reptiles.

Native looks like a lizard, but it's really the sole survivor of an order that goes back to the dinosaurs.

They're entirely endangered, so the problem for these guys is again.

They evolved in the presence of avian predators, not mammals, and so their response when threatened from above when threatened.

It all is to freeze.

If you freeze and you've got a rat or a stone or a cat behind you, it's game over.

So Zealand AEA is one of the last few places a Tuatara or Ataka.

Hey can relax.

But Kiwis are not content with just predator free parks.

They want to make New Zealand Ah, predator free country.

It is a plan so audacious and scope has been called New Zealand's Apollo project that is, wipe out every rat, every mouse, every possum, every weasel, hundreds of millions of predatory mammals by the year 2050.

And to pull it off, they'll have to spread millions of tons of poison all over this incredibly beautiful country.

But as much as Kiwi's love the Kiwi, not everyone thinks this is a great idea.

While most New Zealanders have said they support protecting their islands, native species and the killing of the predators in uninhabited areas, there are concerns about spreading poison around.

For one thing, it can kill pigs and deer, which aren't native to the islands but aren't target predators either.

For another, experts say, the poison won't work on its own and neither will things like fences.

Some scientists have proposed genetically modifying certain predators to keep them from breeding.

Technology for that doesn't even exist now, and some members of the public don't support using it anyway.

This project is massive, and so is the cost.

Estimates to carry it out range from tens of millions of dollars to several billions, and keeping other invasive species from arriving in the meantime is also a challenge.