Kahan's light illuminates a large portion of tunnel that seems to be shimmering.
Then, as Borimer and the others approach, the new visperillion spreads its wings and comes into focus. It sparkles and is disconcerting to see, but it is nearly twice as large as the first one you sought, over 50 feet long. It is fatter too, and could easily swallow a man whole. Its talons seem sharper, its nose broader, and its wings more sinewy.
A dozen bats fly from their perch sucking its blood in symbiotic bliss toward you, screeching. Like the other visperillion, this is a giant snake-like creature with wings. It has no legs, just taloned claws on the ends of its wings. It is a creature that can only live in these giant caves, for it is too large to survive in any normal caves.
It squeals at you and hisses violently, a mother coming to protect its young. You have the feeling it also has other surprises in store.
It has come from the large western tunnel, and you now all stand in the northwest area near that tunnel.
Junar had run, afraid, down the northern tunnel (where you originally came from).