When Sydney hosted the 2000 Summer season Olympics, an unlikely hero emerged: an unofficial mascot often known as Fatso the Fats-Arsed Wombat. Launched by comedians, it helped to kick off a wave of affection for a critter not at all times adored by human Australians. Over the centuries, the native marsupial has been eaten in stew and maligned as a pest. Now, it’s a spotlight of conservation and animal welfare efforts.
Wombats are intently associated to koalas and nurture their younger in pouches like different marsupials. Of the three species, one is threatened and one other endangered, however the bare-nosed wombat (Vombatus ursinus), present in Southeast Australia and Tasmania and thought to quantity greater than one million, is neither. So it’s been studied lower than its hairy-nosed cousins.
“It is a species that everybody loves, however simply doesn’t know an excessive amount of about,” says Georgia Stannard, an archaeologist at La Trobe College in Bundoora/Melbourne.
Stannard is certainly one of a handful of scientists working to alter that, and the efforts are bearing fruit. Over the previous decade, analysis on bare-nosed wombats has revealed traits of its subterranean habitat (as explored by robotic), the meat cuts most favored by Tasmanian Aboriginal peoples 1000’s of years in the past (head, chest and forelimbs have been introduced house to the cave), and the intestinal strategies liable for its startling, cube-shaped droppings (which earned a tongue-in-cheek Ig Nobel Prize in 2019). Latest work has additionally illuminated the worrisome results of a parasitic illness that first got here to the continent with European colonists.
Stannard, together with Scott Carver of the College of Georgia in Athens and Alynn Martin of Texas A&M College-Kingsville, summarized the state of data on the bare-nosed wombat within the 2024 Annual Evaluation of Animal Biosciences. Along with noting its prodigious digging prowess and busting wombat myths (it doesn’t have a square-shaped anus and is unlikely to achieve speeds of 25 miles per hour), the authors write that bare-nosed wombats might be in bother as a result of risks from roads and conflicts with individuals. Local weather change and the unfold of mange additionally pose hazards to the remaining populations.
“It’s not an enormous stretch of the creativeness to say inside, doubtlessly, I suppose 50 to 100 years, that wombats may decline to a degree that they might be thought-about endangered,” Stannard says.
Human-wombat relations: It’s difficult
The wombat’s relationship with individuals goes again millennia. For instance, researchers discovered wombat stays in a Tasmanian cave utilized by people 20,000 to fifteen,000 years in the past. Wombats have been good eats, Stannard says — “little casseroles on legs.” (Stannard hasn’t had a style, however the journals of George Augustus Robinson, a Briton and liaison to Indigenous populations within the 1800s, report that wombat rump made a yummy stew with onions and potatoes.)
Colonists and early guests to Australia appreciated wombats at first, together with different iconic species such because the platypus. “They have been one of the crucial standard Australian animals,” says Carver, an ecologist who started learning the creatures whereas on the College of Tasmania in Hobart.
However that fascination soured when wombats, prolific diggers, received caught up within the basic rage in opposition to pesky, non-native rabbits. Rabbits have been launched for looking in 1859 and unfold like, properly, rabbits, excavating warrens and inflicting in depth ecological injury throughout many of the continent. Wombat burrowing is sweet for the soil as a result of it turns over vitamins. However beleaguered farmers, apprehensive about their crops, fences and dams, didn’t at all times make the excellence between burrowing wombats and burrowing rabbits. By the mid-1900s, officers within the state of Victoria have been providing a bounty of 1 greenback per wombat head.
Even within the late 1900s, says Stannard, “wombats have been thought-about an enormous pest” — and in some components of Australia, they nonetheless are.
However wombats are once more feeling the love, and consultants, at the very least, admire their advantages. “They’re ecological engineers,” says Julie Outdated, a biologist at Western Sydney College. “Their burrowing makes habitat for different animals and helps plant development by aeration of the soil and making water extra accessible.”
Some individuals nonetheless kill wombats to guard their buildings or crops, however this usually requires a license, and conservationists have discovered methods to guard infrastructure. If wombats dig beneath fencing, farmers can add wombat-sized gates. Fabricated from wire mesh and swinging like doggy doorways, they’re weighted to permit wombats to push by however to dam undesirable critters, similar to wallabies that eat grass meant for sheep. Different one-way gates may be draped throughout entries to burrows in locations the place the wombats will not be needed in order that any of the animals inside can escape however not get again in, Outdated says.
Digging into wombat science
Naked-nosed wombats now inhabit a crescent-shaped swath of southeastern Australia, plus Tasmania and Flinders Island, which lies between Tasmania and the mainland. Whereas their subterranean habitats make them troublesome to rely, Carver and others estimate there are greater than 1.3 million of them round. Utilizing genetic markers, Carver has discovered that the mainland, Tasmania and Flinders Island populations are genetically distinct.
Even with new efforts to guard them, their populations nonetheless face many risks. They steadily find yourself as roadkill. Local weather change could pressure the cool-weather-loving critters to larger elevations. And colonists, presumably, launched the mite Sarcoptes scabiei to the panorama. The mite causes annoying scabies in individuals and related signs in different mammals, however a debilitating “crusted mange” in wombats, data of which return a century.
The mites burrow into the wombat’s pores and skin. The marsupial’s fur falls out, and it turns into emaciated and disoriented. Cracks fracture the pores and skin, and if not handled, the creature ultimately dies of secondary infections. “It’s horrific,” says Outdated.
Carver and different researchers are working to know the bare-nosed wombat to raised gauge which threats are essentially the most urgent. Carver names automobile collisions, mange and encounters with landowners as key points.
To collect extra data, Outdated runs a citizen science challenge, WomSAT, that tracks wombat sightings, collects inhabitants knowledge and raises consciousness concerning the animals. She expects it’ll assist scientists to perceive the charges of mange and to establish roadkill hotspots, to allow them to use this data to help wombats.
WomSAT has mapped greater than 23,000 wombat sightings from as far north as Brisbane and as far west as Adelaide, with occasional experiences past right this moment’s typical vary. One citizen-scientist caught wombats mating on video. The information up to now present that many wombats die on roads, notably throughout late winter and early spring. In response, Australians have erected cautionary street indicators at some widespread wombat crossings.
Historic data and newer analysis present that wombats share burrows as they journey their house ranges, serving to to unfold mange. When Carver investigated these burrows utilizing a robotic known as the WomBot, he found that the cool, humid underground setting is splendid for mite survival and transmission. Conservationists are attempting to guard the wombats with wire contraptions rigged over burrow entrances in order that exiting wombats will set off a deluge of topical treatment, however it’s not clear how a lot this helps. Researchers are field-testing longer-lasting medicines, Carver says.
Though his analysis has expanded to incorporate different hosts which can be additionally contaminated by the mange mite, he says he wouldn’t have missed the 10-plus years he spent chasing the shy, solitary creatures and investigating their geometrical scat (even together with the occasions he caught scabies from his topics). Research on bare-nosed wombats, he hopes, will proceed to waddle alongside, just like the creatures do.
“They’re a captivating animal,” says Carver.
