Re the black rhinos at Port Lympne - 2 young males are mixed on the African Experience with an amzing number of different species - ostrich , giraffe , Grant's and Grevy zebras , greater kudu , roan antelope , wildebeest , eland , waterbuck , red lechwe , sitatunga , water buffalo , blackbuck , axis and probably other deer . A mixture of breeding groups and surplus males . Seems to work and some groups breeding well . It is a very large area and from what I can tell most species live out year-round . I think the giraffe and probably rhinos spend the winter in yards and housing .