Freshwater crocodiles die every year in Australia from eating poisonous cane toads that humans introduced to the continent. Now scientists have found a way to teach the crocs to avoid the toxic toads.

The loss of so many crocodiles is a problem because they sit atop the food web. "When they decline," Ward-Fear says, "we see this huge hole in the ecosystem, and this kind of ripples out and sets ...

Across northern Australia, freshwater crocodiles are dying in droves, with some populations down by 70%. ... The loss of so many crocodiles is a problem because they sit atop the food web.

Freshwater crocodiles die every year in Australia from eating poisonous cane toads that humans introduced to the continent. Now scientists have found a way to teach the crocs to avoid the toxic toads.

Freshwater crocodiles die every year in Australia from eating poisonous cane toads that humans introduced to the ... The loss of so many crocodiles is a problem because they sit atop the food web.

DANIEL: Which is a problem since the crocodiles sit atop the food web. WARD-FEAR: When they decline, we see this huge hole in the ecosystem, and this kind of ripples out.