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 squirrel
Large natural populations of black (eastern gray) squirrels can be found throughout Ontario and in several parts of Ohio, Maryland, Michigan, Houston, Indiana, Virginia, Washington, D.C., Iowa, Wisconsin, Minnesota, Pennsylvania, and Kentucky. Populations of gray squirrels in which the black subgroup is predominant can be found in these six areas as well as in smaller enclaves in Missouri, New Jersey, southern New York, Illinois, Connecticut, and California. Outside areas of North America where black squirrels occur naturally in abundance, there are several notable introduced populations of black squirrels:
In the United States, the city of Kent, Ohio developed a significant black squirrel population after ten were legally imported from Canada in February 1961 by Larry Woodell, the head groundskeeper at Kent State University. They have driven out native squirrels in many areas, though they peacefully coexist with most other rodent wildlife.