Hedgehog

Hedgehogs belong to a mammal group separate from mice and squirrels. Their spines are modified hairs, while softer fur covers the underside. They forage through vegetation and leaf litter using smell and hearing to locate food. Sheltered nests provide places to sleep and raise young. Seasonal inactivity differs with species and climate, and some populations hibernate. The defensive ball protects vulnerable body parts but is only one aspect of their daily behavior.