Squirrel
Twitchy and territorial, but responsible for planting millions of trees
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Overview
Squirrels are one of the most commonly encountered wild mammals in the world, and one of the most misunderstood. Their fast, unpredictable movements and willingness to approach humans — then suddenly bolt — trigger a startle response that some people interpret as aggression. In reality, squirrels are ecological engineers whose forgetfulness has reforested continents.
Friendly fact
Squirrels will adopt orphaned baby squirrels from other litters — one of the few wild animals observed practicing altruistic adoption of unrelated young.
Fascinating facts
- 1
Squirrels forget where they buried roughly 25% of their food caches — unintentionally planting thousands of trees per individual every year.
- 2
Grey squirrels use 'deceptive caching' — if they think they're being watched, they'll fake burying a nut and hide it elsewhere later.
- 3
Squirrels have a 270-degree field of vision, making their rapid head movements look paranoid to us but highly efficient for predator detection.
- 4
A squirrel's front teeth grow continuously and are self-sharpening on both sides — they gnaw constantly to keep them at a usable length.
- 5
Grey squirrels can locate food buried under 30 cm of snow using smell alone, navigating entirely by scent through a frozen landscape.
Myth vs. Reality
Myth
Squirrels are aggressive and will attack unprovoked.
Reality
Squirrels bite extremely rarely and almost always when cornered, mishandled, or defending a nest. A squirrel approaching you wants food, not a fight.
Myth
Squirrels carry rabies.
Reality
Small rodents including squirrels almost never carry rabies. In the US, there has never been a documented case of a human contracting rabies from a squirrel.
Myth
Squirrels are useless pests.
Reality
Squirrels are critical seed dispersers. The hardwood forests of eastern North America exist in large part because of squirrel forgetfulness — their unclaimed caches became trees.