Botswana: Drought takes Okavango to brink of catastrophe

The Okavango delta in Botswana has suffered 'catastrophic' species loss over the past 15 years, researchers have announced, in the latest sign of a growing crisis for wildlife in Africa. Some wild animal populations in the delta, one of the wonders of the natural world, have shrunk by up to 90 per cent and are facing local extinction, according to the most comprehensive aerial survey yet undertaken there.