According to Will Travers, cofounder and executive president of Born Free, a wildlife charity, Botswana's expanded elephant trophy hunting quota "raises deep biological concerns", however. "Biological, because, as the name suggests, trophy hunters target individual animals they regard as 'trophies', in the case of elephants, those with the largest tusks, the mature males," he told Al Jazeera in an emailed statement. "These long-lived 'elders' are repositories of vital survival knowledge within elephant society, are desired by female elephants, and can successfully reproduce, passing on their genes well into old age. They are targets for poachers and trophy hunters, adding even more pressure on this tiny demographic of animals, which some estimate may represent just 1 percent of Botswana's national elephant herd."