Photo taken on May 13, 2013 shows elephants walking at Amboseli National Park, Kenya. The World Elephant Day was launched on Aug 12, 2012 to bring attention to the urgent plight of Asian and African elephants. (Xinhua/Zhang Weiyi)

Photo taken on April 20, 2013 shows elephants walking at Amboseli National Park, Kenya. The World Elephant Day was launched on Aug 12, 2012 to bring attention to the urgent plight of Asian and African elephants. (Xinhua/Zhang Weiyi)

Photo taken on May 12, 2013 shows elephants walking at Amboseli National Park, Kenya. The World Elephant Day was launched on Aug 12, 2012 to bring attention to the urgent plight of Asian and African elephants. (Xinhua/Zhang Weiyi)

Photo taken on April 20, 2013 shows elephants walking at Amboseli National Park, Kenya. The World Elephant Day was launched on Aug 12, 2012 to bring attention to the urgent plight of Asian and African elephants. (Xinhua/Zhang Weiyi)

Photo taken on April 20, 2013 shows an elephant walking at Amboseli National Park, Kenya. The World Elephant Day was launched on Aug 12, 2012 to bring attention to the urgent plight of Asian and African elephants. (Xinhua/Zhang Weiyi)

Photo taken on May 13, 2013 shows elephants walking at Amboseli National Park, Kenya. The World Elephant Day was launched on Aug 12, 2012 to bring attention to the urgent plight of Asian and African elephants. (Xinhua/Zhang Weiyi)