Hunters in Russia's Far East have shot and killed one of the last seven surviving female Amur leopards living in the wild, WWF said on Monday, driving the species even closer to extinction. Last week environmentalists said there were only between 25 and 34 Amur leopards -- described as one of the most graceful cats in the world -- still living in the wild. (Full story) "Leopard murder can only be provoked by cowardice or stupidity, in this case most likely by both," Pavel Fomenko, WWF's biodiversity coordinator in Russia's Far East said in a statement. A hunter shot the leopard through the tail bone. It tumbled over and was then beaten over the head with a heavy object, WWF said. Amur leopards have not been know to attack humans.