Otomys unisulcatus

The bush vlei rat or Karoo bush rat (Myotomys unisulcatus, formerly Otomys unisulcatus) is a species of rodent in the family Muridae. It is found in Namibia and South Africa. Its natural habitat is temperate shrubland. The Karoo rat uses behavioral adaptations to cope with the dry arid climate. It is a medium-sized rodent with a dark pelage on top and lighter underneath. It has light colored feet and a dark tail. The rat may have light colored fur around its eyes and the back of its ears. == Environment == The Karoo bush rat can be found in the semi-deserts of South Africa. These deserts have extreme temperature fluctuations ranging from below 0 °C (32 °F) in the winter to over 40 °C (104 °F) in the summer. The Karoo bush rat unlike most rodents creates a refuge made of interwoven sticks and is sited on the surface. These stick lodges are found in the shrubs of the desert. They can be over 1 m (3.3 ft) tall and there is only one lodge per bush/shrub. These stick lodges offer protection against the extreme climates, predators, and also a physiological refuge. The temperature variation in the nests are significantly…