CHENGDU, April 14 -- An infrared camera has captured images of a pair of giant pandas at a nature reserve in southwest China's Sichuan Province, local forestry authorities said on Tuesday.

The pair were in the Wanglang National Reserve in Mianyang City, according to a spokesman with the city's administration of forestry.

Panda pair activity has been caught on camera twice in the reserve. In 2011, a pair of adult pandas were seen in Baozigou region, while another pair -- a mother and a cub -- were spotted in Jiefanggou region in 2014.

Experts are analyzing pictures and video footage of the newly-discovered pair to gather as much information as possible.

The reserve, established in 1965, began monitoring wild giant pandas via infrared cameras in 2004.

Giant pandas are one of the world's most endangered species. About 1,600 live in the wild, mostly in the mountains of Sichuan, while more than 300 live in captivity. Sichuan is home to 74.4 percent of the wild giant panda population in China.