The collection of mammals is the largest on the African continent, and as of 1984, was rated as the eighth largest in the world. It includes a large representation of extinct mammals from Botswana. Mozambique, Zambia and Zimbabwe. Significant collections from Malawi, Namibia and South Africa are also preserved. The collection has been partially computerized and compiles a total of approximately 100 000 scientific specimens. Research and activities over the past two decades have focused on small mammals, especially bats. The collection of bats now exceeds 10 000 specimens, with a research focus on the systematics, biogeography and life histories of selected groups. The mammal collection continues to grow with approximately 1000 new specimens accessioned each year.