There are almost no animals left – but we’ve been here before

You know things are bad when the zebras are thin. Even during most droughts, zebras are like matrons at the gym in stripey spandex stretched around plump buttocks. Pastures vanished long ago and our plains resemble Sudan’s Batn-el-Hajar – the Belly of Stones desert – so that I cannot even recall what they were like when they were last thick with green grass.