It's jarring to see Wolverine refer to himself as an animal, but his 'instant waking' power shows that at least in part, the claim is true. In the 2000s, Marvel hinted that Logan might be part of ...

Sabin described the wolverine’s actions ... Don’t let their size fool you. These animals are built like little tanks. Adult wolverines can weigh up to 18 kilograms, and they are tenacious ...