Africa (2013) 5/6

Africa is a 2013 British documentary series created by the BBC Natural History Unit. It focuses on wildlife and wild habitats in Africa, and was four years in the making.
Episode 5 - Sahara
The penultimate episode opens in the cedar forests of the Atlas Mountains, where Barbary macaques have become isolated from other primates by the expanding Sahara. Aerial photography shows the Sahara is a landscape dominated by rock. Animals featured include Grévy's zebra and naked mole-rats, each found on the desert's fringes. Two million barn swallows are forced to cross the Sahara on their migrations, congregating at a poisoned oasis to feed on flies. The last remaining freshwater pools are home to stranded desert crocodiles, filmed hunting tilapia fish. Macro photography reveals the struggles of dung beetles and silver ants, the latter able to survive exposure to the brutal midday sun thanks to their reflective body coating.

Northern Africa is home to the greatest desert on earth - the Sahara. On the fringes, huge zebras battle over dwindling resources and naked mole rats avoid the heat by living a bizarre underground existence. Within the desert, where the sand dunes 'sing', camels seek out water with the help of their herders and tiny swallows navigate across thousands of square miles to find a solitary oasis. This is a story of an apocalypse and how, when nature is overrun, some are forced to flee, some endure, but a few seize the opportunity to establish a new order.