Giant pandas usually live alone. They spend most of their time by themselves. They roam and eat in bamboo forests. They do not have permanent homes. They also do not hibernate in winter. Instead, they move to lower places where it is warmer. Pandas talk mainly using sounds and smells. They make a bleating sound to be friendly with each other. They also leave scent marks. They do this by rubbing their bodies on trees or spraying urine. These smells tell other pandas about their age and gender. They also show if they are ready to mate. This is very important because their mating season is very short.