Cricetomys ansell, commonly known as Ansell's giant rat, is a species of rodent found primarily in the forests and grasslands of Africa. This large rat can weigh up to 1.5 kilograms and has a body length of about 30 to 40 centimeters, excluding its long tail. It is known for its distinctive fur, which is typically brown or gray, and its large ears. Ansell's giant rat is primarily nocturnal and feeds on a variety of foods, including fruits, seeds, and insects. It plays a significant role in its ecosystem by helping to disperse seeds and control insect populations. This species is also of interest to researchers studying biodiversity and rodent behavior.