Squirrels practice art of forestry
An ecologist named Joseph Grinnell way back in 1936 once asked how it was that oak trees could colonize the tops of hills and ridges. Acorns are too heavy for wind to disperse them, and gravity tends to make them travel downhill rather than up. He concluded that animals must be responsible for getting acorns to high places.
Many animals use acorns as a valuable winter food source. Deer, turkey, wild pigs, and bears are heavy users, but an eaten acorn cannot germinate and make a tree.
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