The muscaliet is a small arboreal mammal, similar in some ways to the wolpertinger. It is found in places like South Asia
It has a hare-like body, with the feet and legs more like a squirrel. The tail is also squirrel-like, but proportionally larger. The head is like a weasel, with a snout like that of a mole and a pair of small porcine tusks. It is 20cm long, roughly the size of a red squirrel, and is adapted to flee from predators rather than fighting back
Unlike many other mythical creatures it has a specific diet: It is a herbivore, and feeds on leaves, flowers, fruit, roots, and generally all the parts of the tree that it can gnaw through
Given this information, could the Muscaliet realistically exist and fill some niche in its environment as described?