Hedgehog

Hedgehog at a glance

Need to know

• Hedgehogs have around 5,000–7,000 spines, each replaced every year.
• They can roll into a tight ball for protection, exposing only their sharp spines to predators.
• Hedgehogs are nocturnal and have excellent hearing but poor eyesight.
• They are one of the few mammals known to exhibit 'anointing' behavior, covering their spines with frothy saliva.
• Hedgehogs hibernate in colder regions during winter but remain active year-round in warmer climates.
• Their diet includes insects, worms, snails, and sometimes even small vertebrates and fruit.

About the Hedgehog

Hedgehogs are small, spiny mammals found throughout Europe, Africa, and Asia. With their iconic prickly backs and ability to roll into a defensive ball, hedgehogs are one of the most recognizable wild mammals. They are primarily nocturnal, foraging by night and relying on their acute sense of smell and hearing to locate invertebrate prey.

Although hedgehogs have long been beloved in both folklore and urban gardens, many species are under increasing pressure from habitat loss, road mortality, and climate-related changes. Hedgehogs fill an important ecological role by controlling insect populations, but some species are experiencing notable population declines, especially in western Europe. Conservationists are working to protect their habitats and raise awareness of their plight.

Physical characteristics

Size: 14–30 cm in length (depending on species). Weight: 300 g to 1,300 g (0.3–1.3 kg). Lifespan: 2–5 years in the wild, up to 10 years in captivity.

• Back covered with sharp spines (modified hairs)
• Small pointed snout
• Short limbs and tail
• Soft fur on belly
• Large, dark eyes

Notable species

• European Hedgehog (Erinaceus europaeus) — Vulnerable. Woodlands, meadows, gardens, parks Regions: Britain, Western Europe, Scandinavia, Western Russia, Northern Italy, Iberian Peninsula.
• Northern White-breasted Hedgehog (Erinaceus roumanicus) — Least Concern. Forests, rural gardens, parks, grasslands Regions: Eastern Europe, Balkans, Western Russia, Caucasus, Part of Middle East.
• Four-toed Hedgehog (Atelerix albiventris) — Least Concern. Savanna, grassland, open woodland Regions: West Africa, Central Africa, East Africa, Sudan, Uganda.
• Long-eared Hedgehog (Hemiechinus auritus) — Least Concern. Deserts, arid steppes, dry grasslands Regions: Middle East, Central Asia, Northern India, Pakistan, Mongolia.
• Southern African Hedgehog (Atelerix frontalis) — Least Concern. Savanna, woodland, grassland Regions: South Africa, Botswana, Namibia, Zimbabwe, Swaziland.
• Desert Hedgehog (Paraechinus aethiopicus) — Least Concern. Deserts, rocky areas, oases Regions: North Africa, Sinai Peninsula, Arabian Peninsula, Middle East.

Habitat and range

Original range: Ancient hedgehogs evolved in parts of Eurasia and Africa approximately 15 million years ago.

Current distribution: Present across most of Europe, Africa, and Asia, with introduced populations in New Zealand; absent from North America and Australia (except as exotic pets).

Preferred environments: Deciduous woodland, Meadows, Grasslands, Urban gardens, Savannas, Desert edges

Regions: Britain, Western Europe, Eastern Europe, Scandinavia, North Africa, West Africa, Central Asia, Middle East, Parts of South Africa, New Zealand (introduced)

Where to see Hedgehog

• British countryside (woodland and hedge-lined meadows) — May to September (peak nighttime activity). Look for them at dusk in gardens and along hedgerows.
• Urban parks in France and Germany — Late spring through autumn. Check leaf piles and under shrubs after dark.
• Savannas near water sources in Kenya and Uganda — Rainy season (March–May, October–December). Early night hours are best; follow insect activity.

Behavior and diet

Diet: Primarily invertebrates: beetles, caterpillars, earthworms, slugs, and snails; will also eat eggs, fruit, fungi, and small vertebrates on occasion.

Social structure: Solitary except during mating and while raising young; each individual maintains its own territory.

Communication: Communicate through grunts, snuffles, hisses, and small squeaks; scent marking is also common.

• Rolls into a spiny ball for defense against predators.
• Anointing behavior: spreads frothy saliva onto spines after discovering new smells.
• Hibernates in cold climates, sometimes reducing heart rate to just a few beats per minute.
• Mothers may move young one-by-one if disturbed.

Interactions with other animals

• Badger (predator): Badgers are among the few predators able to unroll and eat hedgehogs.
• Frogs/toads (prey): Hedgehogs occasionally prey on frogs and toads, especially in moist gardens.
• Domestic cats and dogs (competitive): Cats and dogs may inadvertently kill or injure hedgehogs, particularly juveniles.
• Earthworms, slugs, beetles (prey): Main prey items for hedgehogs, affecting local invertebrate populations.

Conservation

IUCN Red List status: Vulnerable (European populations); most species Least Concern

Threats

• Habitat loss due to urbanization and agriculture
• Road mortality (car strikes)
• Pesticide use reducing prey availability
• Fragmentation of wild spaces
• Predation by badgers and domestic pets

Conservation efforts

• Creation of 'hedgehog highways' (garden gaps and safe corridors)
• Protection of wild habitats and urban green spaces
• Legislation against harmful pesticides
• Citizen science monitoring projects

How to help

• Cut holes in garden fences to allow hedgehogs to roam (hedgehog highways)
• Avoid pesticides and slug pellets, which poison hedgehogs directly or indirectly
• Leave wild areas and piles of leaves/logs for shelter
• Turn over piles of garden waste carefully before burning or composting
• Participate in local wildlife monitoring schemes

Hedgehog facts for kids

Hedgehogs are small, spiky animals that come out at night to look for bugs to eat. They roll into little balls when they’re scared, showing only their sharp spines. You might spot them in gardens or parks if you look carefully after dark!

• Hedgehogs have about 5,000 spines—for defense, not for shooting!
• Baby hedgehogs are called hoglets.
• Hedgehogs love to eat worms and beetles.
• They curl into a ball to hide from danger.
• Some hedgehogs can even hibernate in winter.

Did you know? Did you know? Hedgehogs sometimes make funny froth with their spit and wipe it on their spikes—no one knows for sure why!

Watch & learn

• The Secret Life of Hedgehogs - Nature Documentary — BBC Earth. A beautifully filmed look into the nocturnal world and remarkable survival adaptations of Erinaceidae, offering insights into their diet, habitat, and threats. Features incredible footage and expert narration.
• Hedgehogs: Tiny Survivors - Nature’s Nightshift — PBS Nature. This episode dives into the hidden life of hedgehogs using night-vision cameras to reveal their foraging behavior and the challenges they face in the wild. Excellent for learning about mammal adaptation strategies.
• Hedgehog Highways: Urban Adventurers — Smithsonian Channel. Explores how hedgehogs navigate the complexities of cityscapes, with fascinating footage of their resourcefulness in adapting to urban environments. Highlights recent conservation efforts.
• Hedgehogs: The Spiny Mammals of Europe — National Geographic Wild. Documents the life cycle of European hedgehogs, their distinctive spiny defense, and their role in the ecosystem. Includes rare close-ups and expert analysis.
• Inside Nature’s Giants: Hedgehog Dissection and Ecology — Channel 4 (via PBS/Nature). Offers both anatomical and ecological insights into the hedgehog, combining in-depth dissections with wild footage explaining their physiology and evolutionary adaptations.