On the last morning of our safari in Nxai Pan National Park, Botswana, the elephants (Loxodonta africana) were on the move from one water hole to another. Here a small herding group with two young elephants makes its way past our vehicle. A group of elephants is known as a herd and is led by the oldest female called the matriarch. Male elephants, known as bulls, live alone or with a group of bachelors. Photo © copyright by Brian Divelbiss.