corey nolton say that's not fair because the money goes back into managing and growing the populations of endangered species. nolton received a death threat in namibia. cnn followed him on that hunt in 2015. he feels confident the money is protecting endangered black rhinos from poachers. >> we can't make an individual animal live forever but we can preserve a species for as long as we can, as long as humanly possible, as long as we have an environment through the sustainable use. >> reporter: trophy hunters like to say that they spend more money than anyone to protect animals around the world but they have critics. >> it benefits governments and the companies that put on these hunts but that's it. it doesn't benefit the people. it certainly doesn't benefit the