“You said the mountains were safe.”
Living atop mountains free from the influence of flesh, the worverns nest and collect whatever patches of grasses they can find to build their dens.
Due to their thicker skin layers, their bodies can endure the cold with ease. Occasionally they’ll venture down from the mountains and hunt in the infection zones, consuming all that they can to build up reserves before heading back for their nests. On the way collecting scraps and whatever Cals monsters they can find to heat their eggs and future young.
Despite their wings, these heavy worms fail to properly fly or glide. Often they just throw themselves from peaks, crushing their own bodies beneath the mountains rough and rocky terrain. Due to this and despite their thicker skin, it’s often tattered and scarred. 
However, despite the risk to themselves, the worms have adapted their jumps and falls into a hunting strategy. Often ambushing prey from above and either killing them from the sheer force of the drop or their weight.
But even if the worm misses it’s mark, it’s no stranger to giving chase. Their wings may be useless for flight and gliding, but with their strength they are more than capable of crawling and giving chase around the mountain terrain.
