Do squirrels tails fall off?
Consequently, do squirrels tails grow back?
No, they don't grow back. In fact, their tails are constructed so that they're easily “degloved” - if the tail is caught by a predator the furry outside slips off the bony core, letting the squirrel get away.
Consequently, what causes a squirrel to lose its tail?
Not an uncommon occurrence, squirrels lose hair, including on their tails, to mange and fungal disease. Mange is caused by microscopic mites – likely the species Sarcoptes scabiei – that burrow under the squirrel's skin to feed on the animal's blood.
It serves 3 main functions that enable the squirrel to survive: protection, balance and communication. For example a squirrel can wrap its tail over its body to protect itself from the rain or snow. It can also wrap it around itself when sleeping to keep itself warm. Squirrels also use their tails to communicate.