Working behind the scenes are some of the same criminal gangs that deal in rhino horn. Antoni, who works with PNHF as an anti-poaching ranger, holds up a poacher’s knife he found during our sweep.

Kruger Park's anti-poaching rangers put on a demonstration inside the park in 2015. Gen. Johan Jooste oversaw the ranger corps' transformation into a paramilitary unit. Photo by Herman Verwey / Getty ...

On the other are anti-poaching teams run by the reserves, government agencies, and paramilitary subcontractors. While poaching threatens a number of species, rhinos face a particularly uncertain ...