Mount Oku hylomyscus

The Mount Oku hylomyscus, Hylomyscus grandis, is a rodent of the family Muridae known only from Mount Oku in Cameroon, in tropical Central Africa. It lives in tropical moist montane forest and is the largest wood mouse of its genus, with a head and body 89 to 110 millimetres long and a tail of 130 to 150 millimetres, about one and a half times the length of the body. The fur is greyish brown to cinnamon brown above and greyish white below, with a sharp line between the two colours. The long tail suggests a climbing way of life, but very little is known of its ecology because only four individuals have been collected, all at one site 2,100 metres above sea level; one female caught in January was pregnant with five or six embryos. Its area of occurrence is roughly 470 square kilometres and the forest there is being felled for agriculture, timber and firewood, so the International Union for Conservation of Nature rates the species as endangered.