Shriekwyrms

Shriekwyrms are a giant, mammalian predator native to the lower depths of Subterra. They resemble giant, mutant bats the size of small houses.

Physiology
Shriekwyrms are mammalian in form, covered in a layer of rough hair over pale skin. Their forelegs stretch out from the body, lined with large leathery wings, ending in hooked claws they use to clamber about their subterranean homes. Shorter back legs balance the remainder of the creature's weight and are attached to the rest of their long wings. A stubby tail extends between the legs, swaying about for minor amounts of balance. From the front of the beast extends a long craning neck at the end of which its head rests. Two large ears extend from the tops of the head, granting it incredibly sensitive hearing; a flared, leaf-shaped nose sprouts from the front of its snout, allowing it to easily catch the scents of nearby prey or the pheromones of other shriekwyrms.