Head out on patrol with the Black Mambas, South Africa's first women-led anti-poaching unit.

They protect a nature reserve in the Greater Kruger National Park that holds the largest remaining populations of black and white rhinos and is home to ground pangolins, one of the most trafficked animals in the world.

What makes this unit unique? Almost all of the members of the Black Mambas are women. And none of them carry guns. Author and photographer Kelly Crull travelled to South Africa to meet with these courageous women and help them tell their story.