Black wildebeest
Features necessary for defending a territory, such as the horns and broad-based skull of the modern black wildebeest, have been found in their fossil ancestors. The earliest known fossil remains are in sedimentary rock in Cornelia in the Orange Free State and date back about 800,000 years. Fossils have also been reported from the Vaal River deposits, though whether or not they are as ancient as those found in Cornelia is unclear. Horns of the black wildebeest have been found in sand dunes near Hermanus in South Africa. This is far beyond the recorded range of the species and it has been suggested that these animals may have migrated to that region from the Karoo.
Black-capped squirrel monkey
The black-capped squirrel monkey ("Saimiri boliviensis") is a South American squirrel monkey, found in Bolivia, Brazil and Peru. This South American monkey can be found in numerous zoos (with over 80 zoos keeping them in Europe alone, the majority of them being of the Bolivian subspecies) around the world, including the Ellen Trout Zoo, London Zoo, Apenheul Primate Park, Copenhagen Zoo and Auckland Zoo. Black capped squirrel monkeys are flexible omnivores, with diets including insects, fruits, flowers, eggs, and even small vertebrates (NeuroImage, Academic Press).