In this picture, a baby panda lies on its back in an incubator.

Feng has been photographing pandas for years, ever since she formed a bond with the reserve on her first trip to China.

A giant panda is seen on a tree at the new base of the China Conservation and Research Center for the Giant Panda in Wolong, Sichuan province, on October 30, 2012.

Visitors take photographs of a panda in an enclosure at the Giant Panda Research Base in Chengdu, China, June 24, as thousands of visitors gather for the Duanwu festival or better known as the Dragon Boat festival.

Workers show off the baby pandas at the Giant Panda Research Base.

Fu Hu, a panda born at Vienna's Schoenbrunn Zoo plays in the snow in his enclosure on Jan. 17.

An American robin leaps from a snowy fence post along a pasture on a farm near Oakland, Ore., on Jan. 16.

Adelie penguins making their way towards the fast ice near Mawson's Hut in Commonwealth Bay, Antarctica, on Jan. 15.

A sheep on a hillside in rural Douglas County near Elkton, Ore., on Jan. 15.

Gulls sit on a partially frozen lake in in Berlin on Jan.15.

Horses rear on a frosted field in England on Jan. 16.

Khan, a 2 year old male rare Bengali white tiger, licks snow inside an open-air cage at the Royev Ruchey zoo in Russia on Jan. 11.

Giant panda Yang Guang is seen eating bamboo branches through a hole of a FedEx container at Chengdu Shuangliu International Airport, Sichuan province Dec. 4,.

A cargo plane with a picture of a panda prepares to take off with two pandas to be transported to Edinburgh, Scotland, from the airport in Chengdu in southwestern China's Sichuan province, Dec. 4.

Chinese Panda Tian Tian arrives at Edinburgh Airport on Dec. 4, in Edinburgh, Scotland. The eight-year-old pair of giant pandas arrived on a specially chartered flight and will be the first to live in the UK for 17 years. Edinburgh zoo is hopeful that the pandas will give birth to cubs during their 10 year stay in Scotland.

A group of giant panda cubs nap at a nursery in the research base of the Giant Panda Breeding Centre in Chengdu, in southwest China's Sichuan province on Sept. 26. China has launched its once-a-decade panda census, trying to determine how many of the endangered animals live in the wild amid efforts to boost numbers. The census -- the fourth since it was first launched in the 1970s -- is also expected to ascertain pandas' living conditions, ages and any change in habitat.

This photo provided by the Schoenbrunn Zoo shows seven month old panda cub Fu Hu exploring the outdoors for the first time in Vienna, Austria on March 24. Fu Hu, who was born on Aug. 23, is a sensation because he was conceived naturally. He follows in the footsteps of his older brother, Fu Long, who charmed Austrians before leaving for China in 2009.

Seven month old panda cub Fu Hu exploring the outdoors for the first time at Schoenbrunn Zoo in Vienna, Austria on March 24.