The big-eared hopping mouse (Notomys macrotis) is an extinct species of mouse, which lived in the Moore River area of south-western Australia. The big-eared hopping mouse was a small, rat-sized animal resembling a tiny kangaroo. It had large eyes and ears with a brush-tipped tail. It moved on its four legs when traveling at a slower pace, or by bounding upon its enlarged, padded, hind feet when traveling quickly. They mainly lived in sand dunes or nests made of leaves and other organic materials, which attributed to the “morphological and physiological adaptations” of the elongated hind feet and brush-tipped tail to increase agility through such an environment (Breed 21). The big-eared hopping mouse was among many hopping mice to be extinct, and its absence from extensive sub-fossil collec