&gt; I thought these guys are nearly invulnerable<p>They&#x27;re not armored, they just have spines to discourage soft fleshy bits from getting too close. They&#x27;re preyed on by large birds (some owls, golden eagles — &gt;40% of golden eagle preys in Gotland, ~30% in Estonia), juveniles and sick individuals are preyed upon by dogs and foxes. Badgers are strong enough with long enough claws[0] that they can go through the coat, but AFAIK only bother to do so when very hungry.<p>Also cars and trucks, hedgehogs are not car-proof.<p>[0] <a href="http:&#x2F;&#x2F;cdn2.arkive.org&#x2F;media&#x2F;BD&#x2F;BD56A45A-197D-4EC4-BC79-D052AAE85AD5&#x2F;Presentation.Large&#x2F;Front-paw-of-a-badger.jpg" rel="nofollow">http:&#x2F;&#x2F;cdn2.arkive.org&#x2F;media&#x2F;BD&#x2F;BD56A45A-197D-4EC4-BC79-D052...</a>