The Pallas's squirrel (Callosciurus erythraeus) is a native to Greater China but not Hong kong, where are local population has been introduced, probably as escaped pets.
Pallas's squirrels are primarily herbivorous.
1. SQUIRRELS ARE RODENTS.
They’re members of the family Sciuridae, which includes small- and medium-sized rodents like tree squirrels, ground squirrels, flying squirrels, chipmunks and prairie dogs.
2. A SQUIRREL’S FRONT TEETH DON’T STOP GROWING.
To prevent those four teeth from getting too long, squirrels must frequently gnaw on things. (The same is true of other rodents. In fact, “rodent” is derived from “rodere” in Latin, which means: to gnaw.)
3. OTHER SQUIRRELS (AND BIRDS) STEAL A QUARTER OF A SQUIRREL’S HIDDEN FOOD.
Squirrels can also have difficulty keeping track of their buried stash.
4. SQUIRRELS USE SOMETHING CALLED “DECEPTIVE CACHING” TO DETER THIEVES.
Squirrels will sometimes cleverly pretend to bury nuts by digging a hole and then covering it up with nothing inside.
5. SQUIRRELS HAVE POWERFUL SENSES OF SMELL.
6. SQUIRRELS ARE NOT SOCIAL ANIMALS.
They are territorial and rarely interact with one another.
7. SQUIRRELS RUN IN A UNIQUE PATTERN TO ESCAPE PREDATORS.
Running (even along tree branches) in a zigzag pattern makes it more difficult for squirrels to be snatched by hawks and other animals.
8. THERE ARE NO SQUIRRELS IN AUSTRALIA.
But there are more than 200 species all over the rest of the world. In 2016 the Pallas's squirrel was on a hit list of 37 invasive species drawn up by the European Union banning them from being brought into the UK .