Hedgehog

Hedgehogs are mentioned several times in the How to Train Your Dragon Book series.

Description
Hedgehogs are small mammals known for their prickly spines along their backs, sides, and the top of their head. They are members of the SubFamily Erinaceinae. Hedgehog species occur naturally in Europe, Asia, and Africa. They have been introduced elsewhere, such as New Zealand and are considered an invasive pest.

Hedgehogs can roll in a defensive ball, hiding their vulnerable faces and bellies, and presenting the prickly spines to a would-be predator. Despite that, Hedgehogs do get preyed upon by some Birds of Prey such as the Eagle-Owl, and also some land carnivores such as badgers.