Nairobi’s lions are almost encircled by the city. A Maasai community offers a key corridor out

Maasai pastoralists living by the national park in Kenya's capital are helping wildlife with a crucial migratory route through their land - at great risk to their cherished cattle

Nairobi national park in Kenya is the only large wildlife conservation area to fall within a capital city. It is hemmed in on three sides by human development, and unfenced only on its southern boundary - this gap providing a crucial wildlife passageway, linking the park's animals to other populations of wildlife and wider gene pools.

The gap, however, is also home to a small Maasai community, where farmers face an agonising choice between protecting livestock and making space for the predators that prey on their cattle.