When most travelers head to Africa for a safari vacation they are hoping to spot the “Big Five.” That is shorthand for the big game— lion, elephant, buffalo, leopard and rhino. But, if things don’t change and soon, they will only ever get a chance to see the “Big Four.”

To date, there are only 26,000 rhinos left in Africa — 80 percent of which are in South Africa, mostly in Kruger National Park. Last year, 1,004 rhinos were killed in South Africa. So far this year, the number has climbed to 618, with the toll in Kruger at 400.

Since 1992, Vincent Barkas has been on the front lines of what he calls the “Rhino Genocide” in South Africa. His small unit of just over 100 men patrol the area just south of Kruger in Hoedspruit, South Africa, searching for rhino poachers.