Lesser bilby facts for kids
Quick facts for kids Lesser bilby |
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| A stuffed lesser bilby specimen at Tring Museum | |
| Conservation status | |
Scientific classification  |
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| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Infraclass: | Marsupialia |
| Order: | Peramelemorphia |
| Family: | Thylacomyidae |
| Genus: | Macrotis |
| Species: |
†M. leucura
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| Binomial name | |
| †Macrotis leucura Thomas, 1887
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| historic range | |
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The lesser bilby (Macrotis leucura), also called the yallara, was a small, rabbit-like marsupial that once lived in Australia. It was also known as the lesser rabbit-eared bandicoot or the white-tailed rabbit-eared bandicoot. This unique animal was first described in 1887. It lived in the deserts of Central Australia and was about the size of a young rabbit. Sadly, scientists believe this species became extinct sometime in the 1950s or 1960s.
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Discovering the Lesser Bilby
The lesser bilby was first officially described by a scientist named Oldfield Thomas in 1887. He studied a specimen (a preserved animal) that was sent to the British Museum. Thomas noticed that this animal was similar to the larger greater bilby, but it had enough differences to be considered a new species.
Over the years, other scientists also studied specimens of this animal. They sometimes gave it different names, but eventually, everyone agreed that these were all the same species: the lesser bilby. Another name for this animal was the white-tailed bilby.
What Did the Lesser Bilby Look Like?
The lesser bilby was a medium-sized marsupial. It weighed about 300 to 435 grams, which is less than a pound. Its body, from head to tail, was about 20 to 27 centimeters long. Its tail added another 12 to 17 centimeters.
Its fur was soft and silky. It ranged in color from pale yellowish-brown to grey-brown on its back. Its belly, limbs, and tail were white or yellowish-white. The tail was quite long, making up about 70% of its total body length.
Like other bilbies, it had long, mobile ears that looked a bit like a rabbit's. It also had a long, narrow snout. Lesser bilbies were burrowing animals, meaning they dug tunnels to live in. This species was smaller than the greater bilby, and its ears were shorter, measuring about 6.3 centimeters from base to tip.
Where Did the Lesser Bilby Live?
Scientists don't know a lot about exactly where the lesser bilby lived because it was rarely seen. The first specimen was even found in an unknown location!
In more recent times, we know this species lived in the dry central parts of Australia. This included the Gibson Desert and the Great Sandy Desert. It also lived in parts of northeast South Australia and the southeast Northern Territory.
The lesser bilby preferred sandy and loamy deserts. It liked areas with spinifex grass, which grows in tough mounds. It also lived in places with mulga trees or canegrass.
Lesser Bilby's Daily Life and Habits
Like its relatives, the lesser bilby was a nocturnal animal. This means it was active at night and slept during the day.
It was an omnivore, eating both plants and animals. Its diet included ants, termites, roots, and seeds. It was also known to hunt and eat small rodents that had been introduced to Australia.
Lesser bilbies dug burrows in the sand dunes. These burrows could be 2 to 3 meters (about 6 to 10 feet) deep. During the day, they would close the entrance to their burrow with loose sand to stay safe and cool.
Scientists think that lesser bilbies might have bred at any time of the year. It was also common for them to give birth to twins.
Interestingly, the lesser bilby was described as quite aggressive and tough. One scientist, Hedley Finlayson, wrote that they were "fierce and intractable." He said they would bite and make harsh hissing sounds if someone tried to handle them.
Why Did the Lesser Bilby Disappear?
After its discovery in 1887, the lesser bilby was rarely seen. Scientists didn't know much about it. In 1931, a scientist named Finlayson found many of them near Cooncherie Station and collected 12 live specimens. Even though he said they were common in that area, these were the last live lesser bilbies ever collected.
The last sign of a lesser bilby was a skull found in 1967. It was discovered below a wedge-tailed eagle's nest in the Simpson Desert. Scientists estimated the bones were less than 15 years old. Some Indigenous Australians also remember seeing this species possibly into the 1960s.
Many factors led to the extinction of the lesser bilby. The introduction of new predators, like domestic cats and foxes, was a major problem. These animals hunted the bilbies. Rabbits also competed with bilbies for food. Changes in how fires occurred in the landscape and damage to their habitat also played a role.
However, many experts believe that introduced predators like cats and foxes were the most likely cause of the lesser bilby's extinction. They hunted the bilbies, which were not used to such predators, and their numbers quickly declined.
See also
In Spanish: Bilby menor para niños
