A ranch dog found a species that had been declared extinct twice. Saving it came down to eighteen animals - and, decades later, a clone of one that had already died.
One morning in September of 1981, on a cattle ranch outside the tiny town of Meeteetse, Wyoming, a dog named Shep trotted up to the house and dropped something dead on the porch. Ranch dogs do this; it was not, at first, remarkable. John and Lucille Hogg looked at the small, slender, dead animal - sandy gold, black feet, a black mask across its face like a bandit - and did not recognize it. So they did the ordinary thing. They took it to a taxidermist in town.
And the taxidermist went pale. Because he knew exactly what it was, and what it was, was impossible. The animal Shep killed was a black-footed ferret - a species the scientific world had already given up for dead. Not endangered. Extinct. This is the story of the ghost the dog found, the plague that came for it, the eighteen animals that stood between it and the end of everything, and the one that came back from the dead.
A ghost of the prairie
To understand why a dead ferret on a porch could stop a scientist’s heart, you have to know what the black-footed ferret is - and what it depends on. It is North America’s only native ferret: about the length of your forearm, built like a furred ribbon of muscle, with the black feet and black bandit’s mask that give it its name. It is a creature of the open prairie, and it is one of the most specialized predators on the continent. It eats prairie dogs - almost nothing else. Prairie dogs make up around ninety percent of its diet. It hunts them, and then it moves into their burrows and lives in the tunnels its prey dug. Its entire existence is stitched to the prairie-dog town. Where the prairie dogs are, it can live. Where they are gone, it simply cannot.
And in the twentieth century, we decided the prairie dog was the enemy. Ranchers and government programs called them vermin - competitors for cattle grass, a hazard of holes - and set out to erase them. Over decades, poisoning campaigns wiped out prairie dogs across the Great Plains by the tens of millions, collapsing the great towns that had covered the West. Nobody was aiming at the ferret. But the ferret’s whole world was those towns, and its whole diet was those animals. Poison the prairie dog, and you starve the ferret out of existence without ever touching it directly. By the 1970s, they were gone. A captive group in South Dakota had failed to breed, the last of them dying by 1979. The black-footed ferret was declared extinct - for the second time. The book was closed.
The dog who was right
Then Shep dropped one on a porch. The taxidermist’s identification set off exactly the kind of quiet scramble you would imagine, and biologists descended on the Hogg ranch with a single desperate question: was that one lost straggler the true final ferret, or was it a crumb from a table still set somewhere out on that Wyoming range? They followed it back. And on the prairie around Meeteetse, they found the thing nobody believed still existed - a living, breeding, wild colony of black-footed ferrets. The species wasn’t extinct at all. Over the next few years the colony climbed to more than a hundred animals, and Meeteetse became one of the most hopeful places in American conservation. A dog had overturned the scientific record. The ghost was real.
Two plagues, at once
And then, in 1985, the sky fell in - twice. Two separate diseases hit the Meeteetse animals in the same window, and between them they were nearly perfectly designed to end this species. The first was sylvatic plague - yes, that plague, the same bacterium behind the Black Death - which tears through prairie-dog colonies and kills them off. It went to work on the ferret’s food supply, collapsing the prairie-dog towns the colony fed on. The second was canine distemper, a virus that, for a black-footed ferret, is essentially one hundred percent fatal. There is no surviving it. One disease was starving them; the other was killing them outright. The colony that had climbed past a hundred began to crater.
Eighteen
And so the biologists faced the same terrible decision that has haunted this kind of work again and again: do you leave a wild animal wild and watch the last of it die free, or do you seize the survivors and gamble everything on cages? At Meeteetse there was barely a choice left to make - the disease was going to take all of them. So between 1985 and 1987 they went out and caught every ferret they could still find, pulling the survivors off the prairie one by one. The last wild black-footed ferret was taken into captivity in 1987. And when the counting was done, when every animal that could be saved had been gathered behind glass, the total number of black-footed ferrets left alive on planet Earth was eighteen. Eighteen animals - seven males and eleven females. That was the whole species. Everything the black-footed ferret would ever be again had to come from those eighteen.
This time it worked
Here is where this story diverges from so many others, because this time the gamble paid off. The captive-breeding program - centered in Wyoming - did the thing everyone was praying for: the ferrets bred. And bred. Of the eighteen, roughly seven became the true genetic founders, the animals whose bloodlines carried forward, and from that impossibly narrow base the numbers began to grow. Releases back into the wild began in 1991. Since then, more than ten thousand kits have been born, and reintroduced ferrets once again hunt prairie dogs across Wyoming, South Dakota, Arizona and beyond. A species that had been declared extinct twice, and then reduced to eighteen individuals, was clawed back from the edge.
The one that came back from the dead
But there was a shadow over all of it, and the shadow was math. Everything alive descended from about seven animals, which means the entire modern population is profoundly inbred - genetically, it is almost a photocopy of a photocopy, and that sameness makes a species fragile in the face of disease. The genetic diversity that was lost when the others died was, everyone assumed, lost for good. Except for one thing almost nobody was thinking about. Back in the 1980s, someone had the foresight to freeze cells from a few founder ferrets and store them in a facility called the Frozen Zoo. Among them were cells from a wild female named Willa - a ferret who had died in the 1980s without ever producing offspring. Her genes, richer and more varied than anything in the living population, had died with her. Or so it seemed.
In December of 2020, scientists took Willa’s cells out of the deep freeze and cloned her. The result was a kit named Elizabeth Ann - the first endangered native species in North America ever to be cloned. She is, in the most literal sense possible, a genetic copy of an animal that had been dead for more than thirty years, carrying diversity that had vanished from the living, inbred population - now walking around again, ready to feed genes back into the species that nearly lost them.
A dog found a species that didn’t exist. Thirty-five years later, we brought one of the last eighteen back from the dead.
What the ferret asks of us
The black-footed ferret is still not safe. Plague still stalks the prairie-dog towns it depends on, its family tree is still perilously narrow, and its future still runs directly through the survival of the prairie dog - the animal we spent a century trying to destroy. But it is out there tonight, hunting in the dark down tunnels it did not dig, because a ranch dog named Shep would not accept that it was gone. It survived being declared extinct twice. It survived two plagues in a single year. It came down to eighteen. And then, impossibly, it came back.
Sourcing note: the rediscovery followed the September 1981 find on the Hogg ranch near Meeteetse, Wyoming; the wild colony was reduced by sylvatic plague and canine distemper, and the last wild ferrets were taken into captivity by 1987, leaving 18 founders. Elizabeth Ann, cloned from the cryopreserved cells of a founder named Willa, was born December 10, 2020 and announced in early 2021. This article accompanies Episode 2 of the Huck Podcast - listen above for the full story.