An intense fight between two Père David's deer attracted millions of online viewers to a live broadcast from Dafeng Milu National Nature Reserve in east China’s Jiangsu Province on Sunday morning. /CFP Photo

Père David's deer, as also known as the milu, is endemic to China, but is considered as "extinct in the wild" by IUCN, with a growing captive population that could one day be reintroduced into the wild. At present, it is the milu’s mating season, meaning there are many ongoing battles between stags for mating rights. /CFP Photo

Millions of netizens watched on as the stags locked horns, listening to commentary from wildlife experts who introduced the story of this very rare species, and conservation efforts looking to bring it back from the brink of extinction. /CFP Photo

Dafeng Milu National Nature Reserve has 4,101 milus, accounting for more than 60 percent of the total population of the species. The reserve is also a conservation area for endangered bird species, including the red crowned crane, insects, fish and other species. /CFP Photo