Hedgehog Facts & Ecology — The Science Behind the Spines (Nature Study Picture Book)
What makes hedgehogs so fascinating?
With a cute face hidden behind sharp spines, the hedgehog is a nature-study friend that sparks curiosity. Its habit of curling into a ball when threatened is especially striking.

Nature and science facts about hedgehogs
A hedgehog's spines are actually modified hairs — hollow inside, so they're light and springy. A single adult has about 5,000–7,000 of them. Hedgehogs are nocturnal omnivores, and in winter they hibernate in a nest of fallen leaves, their body temperature dropping from around 35°C all the way to 5°C. They also do a curious self-anointing behavior, foaming at the mouth in response to new smells and spreading it over their spines.

What Tangobook's «Hedgehog» covers
Tangobook's «Hedgehog» vividly shows how it defends itself with its spines, forages at night, hibernates, and how baby hedgehogs grow up. It ends with a warm perspective: "a little sweetheart hidden behind sharp spines."

Great things to observe together
Point out things like the spines (modified hairs, thousands of them), curling up (defense), hibernation (body-temperature changes), and being nocturnal (active at night). It's fun to talk together about "Why does it curl into a ball?" and "How many spines does it have?"

Parent guide: extending into observation and hands-on experience
Compare the prickliness of pinecones and chestnut burrs with a hedgehog's spines. Try curling your body into a ball to mimic its defense, and experience the idea of hibernation by playing at snuggling under the blankets. (Be careful about actually touching a real hedgehog.)

Frequently Asked Questions (FAQ)
Q. How many spines does a hedgehog have?
A. About 5,000–7,000 in a single adult. They're modified hairs, hollow inside, so they're light and springy.
Q. What do hedgehogs do in winter?
A. They hibernate in a nest of fallen leaves. Their body temperature drops sharply during this time to save energy.
Q. How can we observe them at home?
A. Compare their prickliness with pinecones and chestnut burrs, and try mimicking their curling-up defense (be careful about actual contact).
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