When you feed a squirrel, even if it is really tame, it will usually carry the nut farther away to eat it.
Keep feeding the same squirrel enough times and it will become satiated and start to carry the nuts away to bury them instead.
If you give a squirrel more nuts than it can carry at a single time, then of course, it will be forced to leave the rest behind and come back for them later.
If you do this you will notice that all squirrels will touch each of the remaining nuts with their nose one by one before leaving.
It almost seems as if they need to touch it with their nose to fix it in their minds.