Eastern Grey squirrels are not native to Calgary, there was a jailbreak from the zoo in the 1930s. Since then, they have become a common sight in neighborhoods around the city. I have some resident squirrels that live in the trees on my front lawn and its nice to see them regularly. This one looked like it was either burying its treasures in all the stash points it has or perhaps digging them up for a treat. They know how to save for later and are pretty industrious in figuring out how to store food and have something saved for a rainy day.
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From @mmckinneyphoto13