Animals store excess sugar in a polysaccharide called glycogen, or animal starch. Plants use plant starch to store excess sugar. read more
Using the green pigment in their leaves called chlorophyll, which makes sugar. They store the sugar primarily as starch. Storage in the form of fat / oil is common too, especially in seeds. Animals mostly store excess sugar in body fat, and plants usually make fruit with excess sugar (as long as they have enough water). read more
Starch is the #1 plant carbohydrate (sugar) storage molecule. Animals store extra sugar as glycogen. animals don't tend to store a lot of energy in this way, but they do store extra excess carbohydrates as glycogen which can be easily accessed if needed. read more