No, they can be pulled of but the squirrel will probably bite you before then, or the tail can be cut off which I highly recommend not doing.
Tadpole's tails do not fall off by themselves, but they can be bitten off. I do not know if their tails grow back. I am trying to figure that out right now because 4 of my tadpole's tails got bitten off.
Yes, leopard geckos' tails can fall off easily as a defense mechanism called autotomy.
NO NO NO NO NO NO IT NEVER CAN AND NEVER WILL
No
No, a donkey's tail does not fall off. This is in reference to the animal. However, donkey tail plants do tend to fall off.
They are displaying ownership of a certain area and for other squirrels to stay away
Yes.
Gravity, wind, birds, squirrels
No they can not, but that's a good question.
squirrels gravity wind earthquake
some types, it is used as defense or protection
Their thick bushy tails help them balance on a wire. Kind of like tightropewalkers when they hold the balance bar. The bar helps them keep their balance so the dont fall over off the rope. The squirrel's tail is sort of like a built in balance bar, so it dont fall off the power line.