Minecraft wiki entry for Panda, associated text: Normal pandas:
Do not have unique personality actions.
Lazy pandas:
Lie on their backs.
Are slower than normal pandas, making them the slowest land mob in the game.
Do not follow a player who is holding bamboo while they're lying on their back. ‌[JE only] In Bedrock Edition, if a player is holding bamboo, a lazy panda stops lying on its back and starts following that player.