Back from the Brink: Resurgence of the Catalina Island Fox tells the story of one of the greatest conservation successes in United States history.

Once teetering on the brink of extinction, the fox has made a dramatic recovery.

A unique subspecies that can only be found on Catalina Island, it typically weighs only 4 to 6 pounds.

In the late 1990s, a unique strain of canine distemper introduced from the mainland by a stowaway raccoon rapidly swept over the island, leaving less than 100 remaining.

A few years later, the U.S. Fish and Wildlife Service officially designated the Catalina Island fox as an endangered species.

The Catalina Island Conservancy assembled a team of scientists and conservationists who scrambled to save the animal.

By 2016, there were more foxes living on the island than there had been before the outbreak, and the fox was removed from the endangered list.