Four rare milu deer, also known as Pere David's deer, are spotted on a tidal flat outside Liubu village in Rudong county, administered by Nantong city in East China's Jiangsu province in recent days. [Photo/ntfabu.com]

Being alert, the four male milu deer are always together and rarely stray. [Photo/ntfabu.com]

According to a local resident surnamed Li, the four milu deer visited Rudong county before the Spring Festival. After inquiries, it appears that they may have been released into the wild by the relevant authorities. It is believed their reintroduction is of great significance to the establishment of a self-sustaining wild milu population that is completely free from human dependence. [Photo/ntfabu.com]

At present, milu deer nature reserves are located in Beijing, Central China's Hunan province and in the Dafeng district of Yancheng city in Jiangsu province. The Dafeng Milu Deer National nature Reserve has the largest wild milu deer population in the world. [Photo/ntfabu.com]