Biologists are rescuing baby sharks and skates from recently caught females, giving the unborn a chance at survival.

A writer bears witness to New York’s endangered species.

Over the past 14 years, Martin Guth has built a monopoly on some of the world’s rarest birds. Will his secretive organization ultimately help put more parrots in the wild, as he says or—push them closer to extinction?

Humpbacks are some of the most watched whales in the world, and yet so much of their lives remains a mystery.

How a night of drunken mischief led to the death of a rare endangered fish and a rare prosecution.

On the frontlines of extinction in the Gulf of California, where the vaquita faces its final days.

The story of a pair of murdered whooping cranes and just how difficult it is to save a endangered species.

In Russia’s Far East, an orphaned female tiger is the test case in an experimental effort to save one of the most endangered animals on earth.

Inside the criminal operation illegally buying, selling and killing tigers – and selling their meat at the local butcher.

An endangered-species murder mystery in Hawaii.