Tag Archives: key deer

The Key Deer and the Screwworm: How Science Saved an Endangered Species — and Why It Matters Again

This past December, I found myself in Big Pine Key, camera in hand, surrounded by the quiet beauty of Florida’s Key deer.

I was there with my friend and collaborator, Paul Fuzinski of Aptitude Outdoors and his wife Christina photographing and filming these animals as part of our ongoing work in wildlife documentary storytelling.

The tiny Key deer move differently than most whitetails—smaller, gentler, almost ghostlike as they slip between hardwood hammocks and pine rocklands.

And when I say tiny we’re talking a big buck tops out at round 60 pounds on the hook. They are the smallest subspecies of whitetail and are a federally endangered species.

In fact, standing there in the early light, it was impossible not to think about how close these deer once came to disappearing altogether.

Their survival is not accidental. It is the result of one of the most important — and often overlooked — wildlife conservation victories in North American history.

In the 1950s their population was down to 50 when the Boone & Crockett Club (B&C) donated $5,000 to hire a game warden named Jack C. Watson to protect them from poachers. Eventually, this action and his efforts were heralded as saving the species altogether.

This action of the B&C is virtually unknown outside of the club itself and a few people in the Keys. I found it out while doing some serious research on the species a few years ago. This is literally a case where hunters stepped in and saved a species outright.

Most recently, according to the U.S. Fish and Wildlife Service (USFWS) officials, Hurricane Irma in 2017 killed 21 deer with an additional dozen killed in the chaotic aftermath. With the latest estimates showing only 949, that hurts.

For perspective, I have hunted on a single 5,000 acre low-fence Texas ranch with more whitetails than that.

Additionally, an old foe last seen in the U.S. more than 30 years ago, hit the Keys hard in 2016. But Texans came to the rescue.

“Screwworms infested the population, which is spread across more than 20 islands. It led to 135 Key deer deaths, including 83 that were euthanized to reduce the risk of further infection,” said Dr. Roel Lopez. “This was a significant blow to a species, which is uniquely located in that area.”

Doctor Lopez is director and co-principal investigator for the Key deer study, San Antonio, a project of Texas A&M University (TAMU). TAMU, along with various agencies including USFWS, alleviated the crisis by preventive treatment and fly eradication efforts. This included feed stations lined with anti-parasitic medications and releasing 60 million sterile male screwworms to mate with wild female flies and curb reproduction.

That is a big effort for a little deer, but there is much love for them among those who understand their delicate existence. A single disease outbreak or storm could literally wipe out the population.

A more consistent issue is roadkill.

When we visited, the sign at the refuge headquarters said 121 were killed by vehicles in 2024 and by our visit Dec. 10, 2025 some 91 had been hit.

The National Key Deer Refuge was established in 1957 to protect and preserve the national interest the Key deer and other wildlife resources in the Florida Keys.

The Refuge is located on Big Pine and No Name Key and consists of approximately 9,200 acres of land that includes pine rockland forests, tropical hardwood hammocks, freshwater wetlands, salt marsh wetlands, and mangrove forests.

It gives them a place to exist but as roads intersect much of it, mortality is still an isssue.

In 2025 New World screwworm has been detected again in parts of Mexico, raising concerns among wildlife biologists, veterinarians, and agricultural officials.

History has shown that the screwworm does not respect borders. Left unchecked, it can move northward, re-establishing itself in regions where it was once eradicated.

For wildlife like the Key deer, the return of screwworm would be catastrophic. For livestock, it would represent billions of dollars in losses. And for conservationists, it would mean fighting a battle we already know is costly, complex, and urgent.

Standing in Big Pine Key this December, watching a doe and her fawn move through the palmettos, it was impossible not to think about how fragile recovery can be. Conservation victories are not permanent unless they are protected.

The story of the screwworm reminds us that vigilance is just as important as scientific innovation.

It also reminds us that many of the greatest conservation successes happen quietly, behind the scenes, through collaboration rather than controversy. Texas A&M’s role in eliminating the screwworm helped save not only the Key deer, but countless other wildlife species and agricultural livelihoods across the country.

The Boone & Crockett Club’s recognition of this effort underscores how deeply connected hunting heritage, science, and wildlife conservation truly are.

Paul and I left Big Pine Key with more than footage. We left with a renewed sense of responsibility to tell this story fully. In 2026 we will be producing a mini-documentary focused on the Key deer, not just their beauty, but the unseen threats they’ve survived and the people who stepped in when it mattered most.

The Key deer are still here because science, cooperation, and commitment won out over complacency. As the specter of screwworm once again looms to the south, their story serves as both a warning and an inspiration.

Sometimes saving wildlife isn’t about finding something new.

Sometimes it’s about remembering what almost happened and making sure it never happens again.

Chester Moore

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Micro Deer: Whitetail Bucks The Size of Coyotes (New Video!)

I’ll never forget the first time my Uncle Jackie told me about the little buck he saw.

We were sitting around after a long day of hunting in the Texas Hill Country, the fire crackling low and mesquite smoke hanging in the air.

He leaned forward, eyes bright, and asked, “You ever seen a deer no taller than a Labrador — full rack, mature, but small as a dog?”

He was dead serious.

“It was in San Saba County,” he said.

“Saw him twice. Little eight-point buck, looked perfect — just tiny.”

For a boy who’d grown up in Orange County, where I didn’t see a deer until I was twelve, that story was pure magic. I couldn’t shake it. A perfectly formed, full-grown whitetail the size of a coyote? It sounded like a legend, the kind of thing old hunters whisper about around campfires.

Watch the new video where I examine these deer in depth.

Years later, after Uncle Jackie passed, I brought it up at his funeral.
I asked my dad, “Did Uncle Jackie ever tell you about that little deer he saw out near San Saba?”

Dad looked at me and said quietly, “I saw one of those deer too. Same lease.”

That moment stopped me. Two sightings, from two men I trusted completely. Maybe, I thought, there really were micro whitetails out there — real, wild deer that somehow slipped beneath the radar of science and common experience.

A Biologist’s Confirmation

Years later, I shared that story with my friend Larry Weishuhn — one of the most respected wildlife biologists and whitetail experts in North America.

Larry, often called “Mr. Whitetail”, has spent decades studying deer populations, from genetics to disease, and has seen just about everything with antlers.

When I told him about my uncle’s story, he smiled and said, “Well, I believe you — because I’ve seen one too.”

Key deer photo by Faith Moore.

Back in the 1970s, Larry was working as a wildlife disease specialist under contract with the Texas Parks and Wildlife Department and Texas A&M’s Department of Veterinary Pathology. His team was collecting deer across central Texas — in San Saba and Llano Counties — to study nutrition, blood chemistry, and general herd health.

“One day,” Larry told me, “I saw a small buck standing by himself. From a distance he just looked young, but when I got closer I realized something was different. He was full-bodied, mature — but small. I shot him as part of the sampling work, and when I walked up to him, I realized he wasn’t more than fifty or sixty pounds. That’s about the size of a collie dog. But anatomically, he was a perfect whitetail — full antlers, fully developed.”

Larry’s team collected tissue and blood samples from that deer, expecting maybe to find a disease or deformity. But everything came back normal.

“It was a healthy deer. Not malnourished, not sick — just small. A true micro version of a whitetail,” he said.

When Nature Experiments

So what causes something like that?

Larry believes it’s likely a rare genetic phenomenon, perhaps dwarfism or a form of line breeding that can occur in small or isolated populations.

“Sometimes when populations are heavily hunted or isolated, you can get very tight gene pools. And when that happens, certain traits can express themselves, including reduced size,” he said.

“It’s similar to what happened in cattle when they used to line-breed Herefords and Angus too closely they would start getting dwarf calves that never grew to normal size.”

He paused, then added, “And of course, nature can throw a wild card every now and then. Just like in humans, sometimes chromosomes align in a certain way, and you get something extraordinary.”

This trail camera photo was submitted by reader Alonzo circa 2019 well before A.I. was a thing. Look at that tiny buck in the foreground.

Larry compared that San Saba micro buck to a Carmen Mountain whitetail, one of the smallest subspecies of deer in North America, which inhabit the desert mountain ranges of West Texas and northern Mexico.

“In size, they were nearly identical. But the genetics were pure whitetail — no subspecies difference,” he said.

That scientific perspective grounded the mystery for me. These weren’t mythical forest sprites or photoshopped oddities but genuine genetic deviations, part of the endless experiment that is nature itself.

Separating Myth From Fact

Over the years, I’ve seen countless photos online claiming to show “the world’s tiniest whitetail.”

Most are fakes or, more commonly, muntjac deer, an exotic species from Asia that reaches only forty pounds as an adult. I’ve handled a six-week-old muntjac fawn myself during this investigation. They were adorable, yes, but not a whitetail.

The author with a muntjac baby.

True “micro” whitetails are vanishingly rare, and the ones I’ve seen documented are scattered across ordinary deer herds, not a distinct subspecies, but rather isolated cases of genetics playing with the blueprint.

One of the most compelling photos I’ve ever received came from a reader named Alonzo. His game camera captured a little buck with forked antlers standing before a full-grown doe. No trick of perspective, no digital tampering. Just a tiny deer living among the rest — a real, living mystery.

Lessons From The Key Deer

Whenever I think about these miniature whitetails, my mind goes to the Key deer which are the smallest officially recognized subspecies of whitetail, found only in the Florida Keys.

Adult Key deer weigh as little as 55–75 pounds and stand barely 30 inches tall. Once nearly wiped out by hunting and habitat loss, they’ve clawed their way back from the brink thanks to protection under the Endangered Species Act.

Their story is one of adaptation with an entire population that adapted to fit its island home.

But the micro whitetails Larry and I have researched are something different. They’re not adapted to survive smaller — they just are. They exist on the outer edge of biological possibility, a reminder that even within a well-known species, nature still has secrets.

The Wonder In Small Things

As I reflect on these stories, from my uncle’s campfire memory to Larry’s scientific encounter, I’m struck by the lesson these tiny deer carry.

In an age where we think we’ve seen it all, where every acre seems mapped and every species catalogued, nature still surprises us. The Key deer remind us how smallness can be a strength. The micro whitetails remind us that sometimes, mystery itself is part of nature’s design.

Larry said it best.

“Chester, that little deer was a regular whitetail — just small. Perfectly normal in every way but size. That’s what makes it so fascinating. Nature doesn’t always follow our rules.”

And maybe that’s the greatest wonder of all, that even in the most familiar species, there are still stories waiting to be discovered. Not everything wild fits into a category. Some things like that little San Saba buck are meant to keep us curious.

Chester Moore

Follow Chester Moore and Higher Calling Wildlife® on the following social media platforms

To support the efforts of Higher Calling Wildlife® click here.

Subscribe to the Dark Outdoors podcast on all major podcasting platforms.

@thechestermoore on Instagram

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Email Chester at chester@chestermoore.com.