caption: Family tree of the largest rhinoceros family represented in the European Endangered Species Programme Southern white rhinoceros Ceratotherium simum simum population. The dominant ♂ genetic contributors are 89, 1011, 221, 70, 491 (see ) and 139. Dominant ♀ genetic contributors are 225, 224, 102, 329, 489, 654, 494 (see ), 496 (see ) and 97. Grey lines indicate mating connections. Black lines indicate parent--child relationship. Squares represent ♂♂ and circles represent ♀♀. Known ages of individuals are with indicated within and individual identification numbers are listed under the respective square or circle. Letters a, b, c, d, e indicate major connecting links between family lines. White fill-in colour indicates F0 generation, blue fill-in colour represents the F1 generation, yellow fill-in colour represents the F2 generation.