What is "lesser bilby"

n. An extinct species of bilby, a rabbit-sized marsupial, ''Macrotis leucura'', previously endemic to arid regions of central Australia.

The lesser bilby (Macrotis leucura), also known as the yallara, the lesser rabbit-eared bandicoot or the white-tailed rabbit-eared bandicoot, was a rabbit-like marsupial. The species was first described by Oldfield Thomas as Peregale leucura in 1887 from a single specimen from a collection of mammals of the British Museum. Reaching the size of a young rabbit, this species lived in the deserts of Central Australia. Since the 1950s–1960s, it has been believed to be extinct.