Pandas feed entirely on the leaves of 30 or more species of bamboo. Their large canines make easy work of the bamboo stalks. Sometimes, when bamboo becomes scarce, they may feed on some other plants and even have been observed feeding on carrion, but this is very rare. Luckily for the pandas, at least two species of bamboo are accessible to them, as the different species of bamboo die off at different times of the year after they flower. If they only had access to one species in their range, after the die-off after flowering, the pandas would die from starvation.
Pandas are solitary animals, coming together only to mate.
They have fairly small territories, with males' larger territories overlapping several females' smaller territories. Territories are marked by an excretion from a gland around the anus, which is rubbed onto trees. This serves as a warning to other males to keep out as well as announcing the pandas' reproductive state and other information. Pandas are very vocal, and will vocalize often, though the purpose is unknown. They are mostly active at twilight and nighttime.