Common names: M. coucha: Southern Multimammate Mouse, Southern African Mastomys (English), Vaalveldmuis (Afrikaans), Lehomo (Sesotho); M. natalensis: Natal Multimammate Mouse, Natal Mastomys (English), Natalse Vaalveldmuis (Afrikaans), Lehomo (Sesotho). Distribution: These species have a very wide distribution across the savannahs, grasslands and agricultural landscapes of subSaharan Africa (Monadjem et al. 2015). Mastomys natalensis has the widest distribution of all African rodents (Colangelo et al. 2013), and are almost ubiquitously distributed across the African continent (van Hooft et al. 2008). Mastomys coucha is restricted to the grasslands and semi-arid savannahs of South Africa, Zimbabwe and Namibia, occurring south of the Zambezi River (Monadjem et al. 2015). It probably occurs in eastern and southern Botswana where there are records of Mastomys (previously assigned to M. natalensis; for example, de Graaff 1981) but that have not been sequenced or karyotyped. Similarly, its status in Mozambique is currently unknown. There are disjunct subpopulations in Angola - Namibia and Zimbabwe - Mozambique (Leirs 2013a). The exact distribution of these latter two populations should still be verified.