Cone scales mound up on the ground below feeding stations in piles called middens. The squirrels also stash mushrooms in the forks of tree branches for later use. Douglas' squirrels open acorns by gnawing on the shells. You may find piles of these opened nuts beneath a tree where the squirrel has been working. Common predators include bobcats, foxes, house cats, and owls.
Humans raid the cone caches for seeds to be used in planting nursery trees.
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