1. The food. Panda main food is bamboo, bamboo sword but bamboo nutrients cannot very good absorbed by panda, 1 kg of bamboo, deer can absorb more than 60% of the panda is less than 20%, caused the panda eat n much bamboo every day. Every day of life is to walk (fixed line), eat, sleep. As with the mouse a virtue, as we go along...
2. Or food. Panda basic don't eat a bug, and basic eat bamboo, even don't eat a lot of other plants, picky about food, once after withered bamboo flowering, pandas will starve to death. Just met in the early 90 s, starved to death the panda.
3. Reproduction. Panda estrus once a year, with the opposite sex after mating success probability is very small, I mean probability of conception.
4. The habitat. Wolong is the panda's house, because there is no natural enemies, the wolong leopard life altitude and the panda is not a level, so there was no panda activities within the scope of the deadly predators. In addition, the panda life altitude, there is bamboo, temperate zone in China, I'm afraid I don't have much choice.
5. This is my own opinion: pandas are actually killing is not a lot, because the panda no value... Don't like tiger, bones or medicine, skin is valuable, it is also a symbol of courage; Panda skin I don't know, but the bones and meat is... Kill pandas are no ability, gentle is famous。