I was watching a gray squirrel in my yard this afternoon scurrying this way and that. I didn't think he was burying nuts and seeds so much as getting food. In fact, he went to a garden timber, sat on it and ate for quite awhile. I wondered if it was just a myth that squirrels buried nuts.
A quick search for "squirrel" and "bury nuts" turned up over 700 hits. One interesting one is "Squirrel hoarding". Gray squirrels favor deciduous forests and red squirrels favor coniferous forests and stash their nuts differently. This is leading to an imbalance in forest propagation. See the article for how humans can help shift this imbalance.