Infrared cameras in Pengze Taohongling Sika Deer Nature Reserve captured a herd of sika deer running and foraging for food. It's the first time that five sika deer, or spotted deer, have been recorded at one time. As an animal that is under first-class state protection in China, there were less than 60 sika deer in the reserve in 1981, but four decades later the population has grown to 400.