A South China tiger is pictured at Shanghai zoo July 8, 2008. Hunting and deforestation have driven China's tigers close to extinction -- with none seen or captured in the past 20 years. Now, conservationists are demanding China's government help prevent these tigers from becoming extinct. Picture taken July 8, 2008. To match feature CHINA-TIGERS/ REUTERS/Aly Song (CHINA) 

A South China tiger is seen at Shanghai zoo July 8, 2008. Hunting and deforestation have driven China's tigers close to extinction -- with none seen or captured in the past 20 years. Now, conservationists are demanding China's government help prevent these tigers from becoming extinct. Picture taken July 8, 2008. To match feature CHINA-TIGERS/ REUTERS/Aly Song(CHINA) 

A South China tiger is seen at Shanghai zoo, July 8, 2008. Hunting and deforestation have driven China's tigers close to extinction -- with none seen or captured in the past 20 years. Now, conservationists are demanding China's government help prevent these tigers from becoming extinct. Picture taken July 8, 2008. To match feature CHINA-TIGERS/ REUTERS/Aly Song (CHINA) 

A South China tiger is pictured at Shanghai zoo, July 8, 2008. Hunting and deforestation have driven China's tigers close to extinction -- with none seen or captured in the past 20 years. Now, conservationists are demanding China's government help prevent these tigers from becoming extinct. Picture taken July 8, 2008. To match feature CHINA-TIGERS/ REUTERS/Aly Song (CHINA)