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Which squirrel is the smallest tree squirrel?

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Do squirrels forget where they hide their food? — squirrel Overview of food-burying behaviour in squirrels.

The smallest tree squirrel is the African pygmy squirrel (Myosciurus pumilio), which is native to the tropical forests of West Africa. It is even smaller than the neotropical pygmy squirrel (Sciurillus pusillus), weighing between 13 and 20 grams with a body length of 6 to 8 cm.1

While the term "pygmy squirrel" is used to describe various minute rodents within the family Sciuridae, the African pygmy squirrel holds the distinction of being the smallest among the tree squirrels.12