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While squirrels are celebrated for their playful antics and remarkable hoarding skills, one of their most notorious behaviors is darting into traffic. Every year, approximately 41 million squirrels are struck on U.S. roadways (Animal People Newspaper, via WorldAtlas), making them one of the most common road‑killed species.
These rodents possess lightning‑fast reflexes and a zigzagging escape pattern that, in the wild, helps them evade predators such as cats, raptors, and snakes. Unfortunately, this same strategy can be deadly when a speeding vehicle approaches. Even a brief pause as the squirrel checks for danger can be fatal, because cars move far too quickly for the animal to clear the lane in time.
Other mammals—zebras, deer, and rabbits—also employ the zigzag maneuver. In fact, the United States estimates that 350,000 deer become road‑kill each year, underscoring the broader impact of this instinct on traffic fatalities.
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It’s a common misconception that squirrels stumble into roads due to poor vision. In reality, squirrel eyes are positioned on the sides of their heads, granting them extensive peripheral vision and the ability to spot threats from almost any angle. However, this placement limits depth perception, a critical cue for judging the speed and distance of an oncoming vehicle.
Without accurate depth cues, squirrels struggle to determine how close a car is before they react. Evolution has not yet equipped these animals to contend with the rapid approach of modern automobiles, which are far newer to their ecological context.
