Hedgehogs are small, spiny mammals native to Europe, Asia, and Africa, prized for their quirky personalities and low-maintenance care as pets. Beneath those quills is a surprisingly tough little animal with sharp senses, odd habits, and a few genuine biological superpowers.
Here are the real facts behind one of the world's most beloved backyard visitors.
There are 17 species of hedgehog in the world, spread across five genera, found natively in Europe, Asia, and Africa.
Hedgehogs are nocturnal, doing most of their foraging and exploring at night.
Hedgehogs are solitary animals that prefer to live and forage alone.
Hedgehogs have poor eyesight but compensate with an excellent sense of smell and hearing.
A hedgehog's spines are actually modified hairs made of keratin, the same protein found in human hair and nails.
When threatened, a hedgehog can roll into a tight, spiny ball using a special muscle called the orbicularis, protecting its soft underside from predators.
Despite looking similar, hedgehogs are not related to porcupines; porcupines are rodents, while hedgehogs belong to a completely different mammal order.
Hedgehogs are capable swimmers.
Hedgehogs are lactose intolerant, so they should never be given milk or dairy products.
Hedgehogs are primarily insectivores, eating beetles, worms, snails, slugs, and other invertebrates, along with the occasional small vertebrate or plant matter.
Wild hedgehogs typically live 2-5 years, while pet hedgehogs in captivity can live 4-6 years with good care.
European hedgehogs hibernate during the winter months when food becomes scarce and temperatures drop.
Hedgehogs communicate with grunting, snuffling, and snorting noises, especially while foraging.
Hedgehogs have good balance and are surprisingly capable climbers, able to scale fences and rough walls despite their stubby legs.
It is illegal to keep hedgehogs as pets in some places, including several U.S. states and cities, so laws should be checked before getting one.
Hedgehogs have a natural, though incomplete, resistance to certain snake venoms thanks to a muscle protein called erinacin, which can neutralize some venom toxins.
Hedgehogs are not ideal pets for young children, since their spines can prick and hurt when handled improperly.
Hedgehogs have a fast metabolism and need a diet relatively high in protein.
Hedgehogs are generally docile and not aggressive; they typically only bite or hiss when they feel threatened.
Pet hedgehogs can carry salmonella bacteria, so owners should always wash their hands thoroughly after handling one.
Hedgehogs are highly adaptable and were introduced to New Zealand by settlers, where they have since become an invasive species that harms native wildlife.
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