Hedgehogs are the only British mammal with spines. When threatened they will roll into a tight ball, with the spines providing sharp protection from predators. Young hedgehogs are born with soft spines under the skin to protect mum, with a second set of spines emerging within days. One peculiarity to all hedgehogs is the way they cover their spines in foamy saliva, the reason why they do this remains a mystery although it has been suggested it might be a sexual attractant, or be used to reduce parasites, or as additional protection. Hedgehogs aren't fussy when it comes to food: worms, slugs, frogs and even bird eggs can be taken during a two kilometre nightly forage, a resistance to adder venom can also put this snake on the menu.

Did you know?
The name for a baby hedgehog is a hoglet.

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