It's clear why the illegal wildlife trade exists. Where there's consumer demand for products from endangered species, there are bound to be networks seeking to profit from that demand. But what about the motivations of individual offenders? TRAFFIC, a wildlife trade NGO, decided to simply ask them. The researchers interviewed 73 people in South African correctional centers, who had been convicted of crimes related to rhinos, abalone, or cycads (ancient palm-like plants that have been called "the world's most endangered plants").