The first species came to America in about 1936. As excellent climbers they go up the nearest tree, sit down with their dark hind parts at a branch and keep quiet and don't move. A good reason for it lays undoubtedly in the beautiful black and white pattern of their skin. One can say they are hidden at the top of a tree, so they cannot be disturbed by any other animals that pass by because they can't see the Pandas up there. Water is the best drink for them, they cannot have enough of it.
Pandas are the most exposed to extinction of any bears.
Bamboo bears are now under protection and can be researched in their own homeland in Chinese jungles.