Twenty Russian wardens already patrol the rivers, some armed with Kalashnikovs to discourage poachers.

FORBES: Catch and Release

In South Africa, some reserves post signs telling would-be poachers that they have de-horned the rhinos.

WSJ: 3 charged in smuggling horns of endangered rhinos

Powers and Thomas have made some high-profile busts: earlier this year on a plainclothes assignment, they caught two poachers with 49 illegal striped bass.

FORBES