Despite only measuring 15cm from nose to tip of tail, the Southern grasshopper mouse is one of the deadliest rodents in the world – remarkably fearless, these mice are aggressive hunters.
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Thriving in the deserts of the southwestern United States, the Southern grasshopper (Onychomys torridus) mouse is largely immune to the venom of the Arizona bark scorpion (Centruroides sculpturatus) and will even turn to cannibalism when food is scarce.
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The Southern grasshopper mouse sidesteps the effects of the Arizona bark scorpion’s venom by shutting down the chemical channel that sends pain signals to the brain, effectively rendering itself numb – although scientists are still unsure why the toxin isn’t lethal. It also employs a brutal hunting tactic, biting off the scorpion’s tail to neutralise its sting.
Their ferocity doesn’t stop there – when confined with other mice, they have been known to kill and consume their cage mates, demonstrating a ruthless streak rare among rodents.
To add to its fearsome image, the Southern grasshopper mouse also howls at the moon. Rising onto its hind legs, it tilts its nose skyward and releases an eerie cry – a chilling warning to rivals and predators alike.
Want to know more about other deadly creatures?
Check out our guides to the deadliest spiders, most venomous animals, deadliest animals to humans, deadliest insects and deadliest fish. Plus, read about Five blood-sucking creatures.
