Hedgehog Facts For Kids (Spiny Mammals That Roll Into Balls)

Picture a tiny animal covered in thousands of sharp spines that can roll into a spiky ball when scared. That's a hedgehog! These adorable little mammals are covered in about 5,000 to 7,000 quills on their backs. Hedgehogs come out at night to hunt insects, snails, and worms. They shuffle through gardens and forests with their pointy noses sniffing the ground. People around the world love hedgehogs for their cute faces and helpful insect-eating habits. Let's learn all about these prickly little friends!

Quick Facts

Scientific Name: Erinaceidae (family, 17 species)
Type: Mammal
Diet: Omnivore (insects, snails, worms, berries)
Size: 5-12 inches long
Weight: 0.5-2.5 pounds
Lifespan: 3-7 years
Habitat: Gardens, forests, grasslands (Europe, Asia, Africa)
Conservation Status: Most Least Concern (some declining)

What Do Hedgehogs Look Like?

Hedgehogs are small, round mammals with spines covering their backs! The spines (also called quills) are modified hairs made of keratin—the same material as human fingernails. Each spine is about 1 inch long with a sharp point. A hedgehog has 5,000 to 7,000 spines on its back. The belly, face, and legs are covered in soft fur. Hedgehogs have tiny ears, small black eyes, and a pointed snout!

European hedgehogs are the largest species at about 10 to 12 inches long! They weigh 1.5 to 2.5 pounds. African pygmy hedgehogs are smaller—about 5 to 8 inches long and under a pound. Hedgehog spines are usually brown with white tips, creating a speckled pattern. Their belly fur is white or cream colored. Baby hedgehogs are born with soft white spines that harden within days!

Hedgehogs have short, sturdy legs and a barely visible tail! Their back legs are slightly longer than their front legs. They waddle when they walk, which looks adorable. Hedgehogs have surprisingly good hearing and an excellent sense of smell. Their eyesight is poor since they're active at night. Their long, pointed noses are always twitching and sniffing for food!

Where Do Hedgehogs Live?

Hedgehogs live across Europe, Asia, and Africa! The European hedgehog is found throughout Britain and most of Europe. African hedgehogs live in the grasslands and savannas of Africa. Long-eared hedgehogs live in Central Asia and the Middle East. Hedgehogs do not naturally live in North or South America or Australia. However, African pygmy hedgehogs are kept as pets in many countries!

Hedgehogs love gardens, parks, hedgerows, and woodland edges! They prefer areas with thick ground cover where they can hide during the day. Garden hedgehogs in Europe are welcome visitors because they eat slugs and snails. Hedgehogs build nests of leaves, grass, and twigs under bushes, log piles, or garden sheds. They're secretive animals that most people only see at dusk or after dark!

In cold climates, hedgehogs hibernate through winter! European hedgehogs build thick nests called hibernacula from piles of leaves. They roll into a ball inside the nest and their body temperature drops dramatically. Their heart rate slows from about 190 beats per minute to just 20. They survive on stored body fat until spring. Hedgehogs in warmer African regions don't need to hibernate!

What Do Hedgehogs Eat?

Hedgehogs are insectivores that also eat other foods! Their main diet includes beetles, caterpillars, earthworms, slugs, and snails. They also eat frogs, baby mice, bird eggs, and fallen fruit. Hedgehogs root through leaf litter and undergrowth with their snouts, sniffing out hidden prey. They crunch through snail shells and beetle armor with their strong jaws!

Hedgehogs hunt using their excellent sense of smell! They shuffle along with their noses to the ground, sniffing constantly. When they detect prey, they push their snouts into the soil or leaves to grab it. Hedgehogs eat noisily—you can hear them crunching and snuffling from several feet away! A hedgehog can eat dozens of slugs and hundreds of insects in a single night!

Baby hedgehogs drink their mother's milk for the first 4 to 6 weeks! After weaning, they start eating insects alongside their mother. Hedgehogs need to eat well during autumn to build up fat reserves for winter hibernation. A hedgehog entering hibernation needs to weigh at least 1 pound to survive. Gardeners who want to help hedgehogs can leave out cat food and fresh water!

Cool Facts About Hedgehogs

Rolling into a ball: When threatened, hedgehogs curl into a tight, spiny ball! Special muscles along their backs pull the spiny skin over their head, belly, and legs. The result is a round ball of outward-pointing spines. Most predators can't get past this defense. Foxes, dogs, and even big cats give up when faced with a ball of sharp quills. Only badgers and eagle owls have learned to get past hedgehog defenses!
Self-anointing: Hedgehogs do something very strange called self-anointing! When they encounter a new smell or taste, they create frothy saliva and spread it on their spines with their tongues. They twist and contort their bodies to reach their backs. Scientists aren't sure why they do this. Some think it adds extra scent protection. Others think the saliva might irritate predators' mouths. It's one of nature's strangest behaviors!
5,000+ spines: Each hedgehog has between 5,000 and 7,000 spines! Unlike porcupine quills, hedgehog spines don't detach when touched. They're firmly rooted in the skin. Each spine lasts about a year before falling out and being replaced by a new one. Baby hedgehogs are born with soft spines hidden beneath puffy skin. Within 24 hours, the spines poke through and start hardening!
Swimming ability: Hedgehogs are surprisingly good swimmers! They can cross streams and ponds by paddling with their legs. Some hedgehogs have been spotted swimming across rivers. However, hedgehogs can drown in garden ponds with steep sides if they can't climb out. Placing a ramp in your pond can save hedgehog lives!
Night hunters: Hedgehogs are nocturnal animals that do all their hunting after dark! They sleep all day in nests hidden under bushes or in thick vegetation. At dusk, they emerge and travel up to 1 to 2 miles searching for food. Their excellent hearing and sense of smell guide them in the darkness. Hedgehogs make snuffling, grunting noises as they forage!
Immune to some venoms: Hedgehogs have a partial resistance to some snake venoms and toxins! They can eat venomous insects and even survive some snake bites that would harm other mammals. This resistance isn't total, but it gives hedgehogs an advantage when tackling dangerous prey. Scientists study hedgehog immunity hoping to learn more about venom resistance!
Garden helpers: Hedgehogs are a gardener's best friend! A single hedgehog can eat hundreds of slugs, snails, and pest insects each week. Gardeners in Europe welcome hedgehogs and create "hedgehog highways"—small holes in garden fences so hedgehogs can travel between yards. Some people build special hedgehog houses to encourage them to nest in their gardens!
Designed for defense: Hedgehogs are perfectly suited for a ground-dwelling, nocturnal life! Their spines protect them while they sleep during the day. Their strong sense of smell finds food in total darkness. Their compact bodies squeeze through undergrowth. Their hibernation ability lets them survive harsh winters. Every feature helps them thrive in gardens and wild spaces!

Baby Hedgehog Facts

Baby hedgehogs are called hoglets! Mothers give birth to litters of 4 to 6 hoglets after a pregnancy of about 35 days. Hoglets are born blind, deaf, and with soft white spines hidden under puffy skin. Within hours, the spines start poking through. By day two, the spines begin hardening. Mother hedgehogs are very protective and may move their babies to a new nest if disturbed!

Hoglets grow quickly during their first weeks! Their eyes open at about 2 weeks old. By 3 weeks, their baby teeth start coming in and they begin exploring outside the nest. At 4 to 6 weeks, hoglets are weaned off milk and start eating solid food. Mother hedgehogs teach their babies to forage by taking them on nighttime outings. The hoglets follow closely, learning to sniff out food!

Young hedgehogs become independent at about 6 to 8 weeks old! They leave their mother and find their own territory. This is a dangerous time because young hedgehogs are small and inexperienced. They must learn to find food, avoid predators, and build good nests. Hedgehogs born in late summer must eat enough to build fat reserves before their first winter hibernation!

Hedgehogs can breed in their first year of life! European hedgehogs usually have one or two litters per year. Hoglets born in spring have the best survival rates because they have all summer to grow. Late-born hoglets sometimes don't gain enough weight to survive hibernation. In the wild, hedgehogs live about 3 to 5 years. Some have been known to reach 7 years!

Why Are Hedgehogs Special?

Hedgehogs are beloved animals that have lived alongside humans for centuries! In Europe, hedgehogs are welcome garden visitors that eat pests and add charm to yards. Children's books and cartoons have made hedgehogs famous worldwide. Their cute faces, tiny legs, and spiny backs make them one of the most recognizable small mammals on the planet!

These spiny mammals are incredibly important for pest control! A single hedgehog eats thousands of slugs, snails, beetles, and caterpillars each year. Gardens with hedgehogs need fewer pesticides. By eating pests naturally, hedgehogs help protect plants without chemicals. They're free, organic pest control that works while you sleep!

Hedgehog populations are declining in parts of Europe! Road traffic, habitat loss, pesticides, and tidier gardens all threaten hedgehogs. Neat, fenced gardens with no wild areas give hedgehogs nowhere to live. People can help by leaving wild corners in their gardens, avoiding pesticides, and creating hedgehog highways between yards. Checking bonfires for sleeping hedgehogs before lighting them saves lives too!

Hedgehogs remind us that wildlife lives right in our neighborhoods! These small, secretive animals share our gardens and green spaces. By making our yards hedgehog-friendly, we can help these amazing creatures thrive. Put out a shallow dish of water, leave some leaf piles for nesting, and skip the slug pellets. You might be rewarded with a snuffling, crunching visitor on a warm evening!