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HomeNatureCaribou Grounds Predate Santa’s Workshop

Caribou Grounds Predate Santa’s Workshop


Which epic journey got here first: Santa Claus’s annual, Christmas Eve circumnavigation of the globe or the grandiose, yearly “reindeer” migration? Scientists say we now have the reply.

Simply 5 days from now, the magic will occur. Santa Claus will step into his gift-laden, reindeer-powered sleigh and make his annual, around-the-world journey.

The character of Santa Claus was initially impressed by the fourth-century, Greek bishop Saint Nicholas of Myra in Asia Minor (now Turkey), a person famend for his generosity and kindness. One of the vital common tales about him entails his anonymously dropping a bag of gold down the chimney of a home that belonged to a few impoverished sisters, who had no cash for dowries. The gold items landed within the stockings that the ladies had hung close to the fireside to dry.

However a narrative that’s even older than Santa Claus himself entails his four-footed helpers, the reindeer, often known as caribou. In accordance with a brand new research from researchers on the College of Cincinnati, caribou have been utilizing the identical Arctic calving grounds for greater than 3,000 years. And that’s not less than 1,200 years earlier than Santa ever arrange his store on the North Pole.

Caribou are members of the deer household. Within the fall, mature males have a putting white neck and mane. Their colours are extra pale throughout the winter. ©Menno Schaefer/

Caribou commutations

In accordance with the Nationwide Park Service, caribou and reindeer are the identical species and share the identical scientific title, Rangifer tarandus. “Caribou” are what the animals are referred to as in North America, and “reindeer” are what they’re often called in Eurasia. Such reindeer dwell largely in Scandinavia and Siberia, and they’re usually smaller with shorter legs than their wild caribou kin.

All caribou are wild animals, whereas reindeer could be wild, semidomesticated or domesticated (animals selectively bred with a selected function in thoughts). Although there are generalized, visible similarities between caribou and reindeer, their look can differ from particular person to particular person, as it’s influenced by food plan, surroundings and, within the case of reindeer, selective breeding.

Caribou are native to Alaska. Whereas there are lots of subspecies of caribou all through the world, the barren-ground subspecies (Rangifer tarandus granti) dominates Alaska.


Caribou and reindeer are the identical species. All caribou are wild animals, however not all reindeer are. Reindeer could be wild, semidomesticated or domesticated.

Barren-ground caribou undertake nature’s longest overland migration, touring so far as 800 miles every year to achieve their spring calving grounds within the Arctic Nationwide Wildlife Refuge and Canada’s Ivvavik Nationwide Park. The most important herd on this space, named for the Porcupine River, numbers within the lots of of 1000’s.

Scientists assume caribou use these areas as calving grounds as a result of they’ve fewer predators and supply seasonal vegetation close to locations the place the caribou can keep away from the worst of the mosquitoes, which may do important injury to a younger calf.

Feminine caribou shed their antlers inside days of giving beginning, abandoning a bodily report of their annual, epic travels throughout Alaska and Canada’s Yukon that will persist on the chilly tundra for lots of of years.


Barren-ground caribou make nature’s longest overland migration, touring nearly 800 miles every spring to achieve their calving grounds within the Arctic Nationwide Wildlife Refuge. The Porcupine Herd, the biggest within the space, numbers within the lots of of 1000’s.

Caribou conveyor belts

Caribou antlers, like these of deer, elk and moose, are made from fast-growing bone that the animals shed every year and regrow the next yr. Realizing that bones dropped by animals that lived dozens of generations in the past can present significant info, scientists from the College of Alaska Fairbanks, the College of Cincinnati, and the U.S. Fish and Wildlife Service determined to gather shed antlers for isotopic evaluation.

However discovering antlers within the huge expanse of the Arctic Nationwide Wildlife Refuge required meticulous logistical planning. Small planes deposited the researchers and their gear deep in Inside Alaska, the place they needed to be watchful for grizzly and polar bears. Utilizing rafts to navigate distant rivers, they performed grid searches of appropriate caribou habitat recognized prematurely utilizing aerial pictures. The scientists walked forwards and backwards, trying to find antlers alongside previous river terraces, overlaying each inch of the realm so as to discover the “historical treasures” uncovered on the tundra.

And discover them, they did. Amazingly, they recovered antlers which have sat undisturbed on the Arctic tundra because the Bronze Age; a few of them turned out to be 3,000 years previous. The outcomes of this research had been revealed within the journal Frontiers in Ecology and Evolution in February 2023.

AdobeStock (Created by Candice Gaukel Andrews)

This sun-bleached, barren-ground caribou cranium with antlers was present in shrubbery on the tundra in Canada’s Northwest Territories.

Whereas male caribou antlers span 4 toes and weigh greater than 20 kilos, these of females are a lot smaller (lower than two toes). Each, nonetheless, include vitamins—reminiscent of calcium and phosphorus—which can be necessary to animals and crops. The dropped antlers additionally create “nutrient sinks,” which might have a profound impact on an space’s vegetation.

In truth, the caribou migration might function a nutrient “conveyor belt” that attracts caribou again to reap the advantages of their “antler fertilizer” in a reinforcement loop. Caribou and different mammals are identified to chew on dropped antlers for his or her invaluable minerals. This might be an necessary dietary complement for brand spanking new caribou mothers.

Caribou consciousness-raising

The researchers report that strolling across the panorama of the Arctic Nationwide Wildlife Refuge and selecting up one thing that’s 3,000 years previous was mind-blowing. Sometimes, to seek out that type of ecological historical past, one must dig deep down into the soil. However on the Coastal Plain, vegetation grows extraordinarily slowly. One of many awestruck scientists famous that the oldest of the antlers that they discovered whereas conducting the research would have been rising at roughly the identical time that Homer was penning The Iliad and The Odyssey.

For greater than 3,000 years, generations of caribou have made the identical epic journey. ©Martin Capek/

This research demonstrates how necessary the caribou calving grounds are for animals that native Alaskans and Canadians nonetheless rely on for sustenance, whilst power corporations search to take advantage of fuel and oil sources on this protected space. Fortunately, in 2023, the Biden Administration suspended drilling leases within the Arctic Nationwide Wildlife Refuge, the biggest tract of undeveloped wilderness in the USA—and in what we now know has been an necessary space for caribou for millennia.

Sadly, although, the Arctic is warming quicker than different elements of the globe. Sections of the Arctic that had been as soon as barren tundra are actually sprouting new spruce forests. The scientists state that this summer time they had been in Arctic Village, Alaska, positioned simply south of the caribou calving grounds, and so they talked with Native American elders in regards to the modifications that they’ve seen. They mentioned that the place as soon as they checked out giant stretches of open, barren floor, there have been now tracts stuffed with timber. They requested, “What is going to occur to the barren-ground caribou as this habitat will get transformed into forests?”

I believe we must always all be asking that query, as a result of it will get on the coronary heart of why we must always care about this panorama, even when we’ll by no means see it.


Within the Arctic, areas that had been as soon as tundra are actually turning into forests. What is going to occur to the barren-ground caribou as this habitat continues to quickly change?

Santa’s caribou crew

There’s an attention-grabbing sidenote about Santa and his much-anticipated sleigh journey: whereas feminine caribou drop their antlers after giving beginning within the spring, males don’t drop theirs till after the autumn mating season, round November. Whereas we don’t know precisely why, it’s thought that the males’ big antlers could be most necessary for competitors with different males throughout the mating season however might be a major downside for survival over the winter. Some great benefits of antlers for females are to make use of them for cover in opposition to wolves—their main predator when they’re pregnant—and to safeguard their spring newborns. Females additionally use their antlers to brush away winter snow when trying to find meals.

Given the December 24 date of Santa’s Christmas trip, then, all of the male reindeer would have dropped their antlers. That implies that the photographs of Dasher, Dancer and the remainder of the gang hitched to Santa’s sleigh—with antlers held excessive—are photographs of an all-female group.

Completely happy holidays, and right here’s to discovering your true locations and pure habitats,





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