Minecraft wiki entry for Development_versions, associated text: Spawn in jungles.
Will seek out bamboo and cake items and eat them.
Can have different personalities: either normal, aggressive, lazy or playful.
Baby pandas will sometimes sneeze, making nearby pandas jump: when they sneeze, they have a chance to drop a slime ball.
Have a chance of spawning as a brown panda, which is very rare.
Sometimes roll and sit on hind legs.