A bilby is a small, burrowing marsupial native to Australia, recognizable by its rabbit-like ears, silky blue-grey fur, and long pointed snout. It’s one of Australia’s most iconic yet endangered animals, with fewer than 10,000 mature individuals left in the wild. Often called the “Easter Bilby” in Australian culture, it occupies a unique ecological role in the arid outback and holds deep significance for Indigenous Australians.
What a Bilby Looks and Feels Like
Bilbies look like nothing else. They have oversized ears (similar in proportion to a rabbit’s) that help them shed heat in the desert, a long tapered muzzle, and soft blue-grey fur. Adults range from 29 to 55 cm in body length and weigh between 800 grams and 2.5 kilograms, with males significantly larger than females. Their tail adds another 20 to 29 cm and is mostly black with a distinctive white tip.
The species you’ll see today is the Greater Bilby (Macrotis lagotis), the sole surviving member of the family Thylacomyidae. A smaller relative, the Lesser Bilby, went extinct in the mid-20th century. Despite their rabbit-like ears, bilbies are bandicoots, belonging to the marsupial order Peramelemorphia. They’re more closely related to quendas and long-nosed bandicoots than to any rabbit or rodent.
Where Bilbies Live
Bilbies once ranged across more than 70% of mainland Australia, from arid deserts to semi-arid grasslands. Today, their range has shrunk to less than 20% of that former territory. Wild populations survive mainly in the Tanami Desert of the Northern Territory, parts of Western Australia’s Pilbara and Kimberley regions, and a small area of southwest Queensland.
They’re creatures of the dry outback, favoring sandy or loamy soils where digging comes easily. Bilbies are strictly nocturnal, spending the daylight hours deep inside spiral-shaped burrows they dig themselves, sometimes maintaining multiple burrows across their home range.
Desert Survival Through Diet and Digging
Bilbies are omnivores with a menu shaped entirely by what they can dig up. Their primary foods are ants, termites, seeds, and bulbs, most of which they find underground using their keen sense of smell. They rarely, if ever, need to drink water. Their bodies have unusually low water and nitrogen requirements, and they get enough moisture from the insects and plant material they eat.
This constant digging does more than feed the bilby. Their burrows improve soil structure, increase water infiltration during rare desert rains, and create pockets of richer, more aerated earth. In this way, bilbies function as ecosystem engineers. Their abandoned burrows become shelters for birds, reptiles, small mammals, and invertebrates that would otherwise have limited refuge from the heat. A single bilby cycling through several burrows over time creates a network of microhabitats that supports a surprisingly wide community of desert life.
Reproduction and the Backward Pouch
One of the bilby’s more unusual features is its backward-facing pouch. Unlike a kangaroo, whose pouch opens upward, a female bilby’s pouch opens toward her rear legs, similar to a koala or wombat. This keeps dirt from filling the pouch while she digs.
Bilbies have one of the shortest gestation periods of any mammal: just 14 days. A female typically carries one or two joeys at a time, and because the turnaround is so fast, she can give birth up to four times a year, producing as many as eight young annually. The joeys are tiny and undeveloped at birth, completing their growth inside the pouch over the following weeks. This rapid reproductive cycle is one reason conservationists are cautiously optimistic about managed recovery programs.
Why Bilbies Are Endangered
The bilby is listed as vulnerable under both Australian federal law and the IUCN Red List. Fewer than 10,000 mature individuals remain, and the population continues to decline. The primary culprits are introduced predators, particularly red foxes and feral cats. Historical records show a strong correlation between the spread of foxes across Australia and the disappearance of bilbies from those same areas. Over half of Australia’s threatened and extinct native mammals have been linked to predation by foxes and cats.
Habitat loss from grazing livestock and altered fire regimes has compounded the problem. Rabbits also compete with bilbies for food and burrow space. Feral cats pose an especially insidious threat because they don’t just kill bilbies directly. Research shows that the mere presence of cats changes bilby behavior, reducing the time they spend maintaining and constructing burrows. Since those burrows are critical infrastructure for entire desert ecosystems, this indirect effect ripples outward to other species as well.
Cultural Significance to Indigenous Australians
The bilby holds deep cultural importance for Aboriginal peoples across Australia’s desert regions. Known by names including Ninu, Mankarr, Warlpajirri, and Aherte depending on the language group, the bilby is an important part of tjukurrpa (the Dreaming, or traditional law and knowledge systems). Historically, bilbies served as a food source, and their tails were used for decoration.
That connection remains alive. As one Indigenous custodian described it: “The Bilby is part of me. Part of this country. It makes my feeling so happy. The Bilby is on the country. I’m with him. My connection with the country. Me and the Bilby got one country to go walking.” Indigenous ranger programs now play a central role in bilby monitoring and habitat management, combining traditional ecological knowledge with modern conservation techniques.
The Easter Bilby and Conservation
Since the 1990s, Australian conservation groups have promoted the “Easter Bilby” as a homegrown alternative to the Easter Bunny. The campaign carries a pointed message: rabbits are one of the invasive species threatening bilbies, so celebrating a chocolate rabbit feels somewhat ironic in Australia. Organizations like the Foundation for Rabbit-Free Australia and the Save the Bilby Fund have driven the initiative, and chocolate Easter bilbies are now mass-produced and sold in supermarkets across the country, with proceeds supporting conservation work.
Beyond chocolate, active conservation efforts include predator-free fenced sanctuaries where bilby populations can breed safely, captive breeding programs at zoos, and reintroduction projects that release bilbies into areas where foxes and cats have been controlled. These programs have shown real success in localized areas, though the challenge of managing feral predators across the bilby’s vast, remote habitat remains enormous.