The world's largest inland delta, the Okavango Delta in Botswana, is home to estimated 200,000 large mammal. But not all of them are year round residents - most of the mammal leave with the summer rains to find new fields of grass to graze on and trees to browse, then make their way back as winter approaches and the Delta fills up again.
The Okavango Delta is produced by seasonal flooding, which peaks during Botswana's dry winter months June and August. The delta then swells to about three times its permanent size, attracts animals from kilometres around and creates one of Africa’s greatest concentrations of wildlife. Kudos Peter Ribton for the video!