They are examining the effect of panda foraging on bamboo.
A new study calls for the swift expansion of some of China's great panda reserves.
Each country was also represented by a small symbol, such as a fleur-de-lis for France, a water buffalo for Vietnam, a panda bear for China, and so on.
The latest field survey showed that the number of pandas in Qinling Mountain area in North China has kept increasing as their habitat improves.
Most recently he visited the Wolong Nature Reserve in China to photograph pandas .
A special factory making bamboo-shaped high-fibre biscuits has been built to feed 30 pandas at a breeding centre in Chengdu, China.
The births have boosted China's number of captive pandas to over 180.
Feeding mostly on bamboo, fruits, and insects, the pandas are native to mountains in China and the Himalaya - where they are better known for skittering up trees than standing at attention.
Researchers would then calculate the optimum panda population for the region, using captive-bred pandas to increase numbers where needed.
The term ‘endangered species’ typically conjures up images of charismatic animals - tigers, pandas , orang-utans, whales, condors.