The Genus Bettongia, commonly known as rat kangaroos, comprises several Australian marsupials. This genus includes four species, Bettongia gaimardi, Bettongia lesueur, Bettongia penicillata, and Bettongia tropica. These small marsupials have long and slender tails, short ears, and powerful hind legs. Their diet consists mainly of fungi, seeds, and roots. They are known for their remarkable ability to dig burrows and are important ecosystem engineers. The genus Bettongia is also called the brush-tailed bettongs because of the bushy tails they possess. The term rat kangaroo is used to describe many small marsupials that share similarities with the Bettongia genus, such as the musky rat-kangaroo.