NPCs composing that spawngroup :

an_eyeless_gnawer (34%)

an_eyeless_gnawer (33%)

a_ravaging_burrower (33%)

NPCs spawning around that spawngroup :
(Max range : 100)

pojustice2010170, range=95 (-1113,-644,-29)

pojustice2010171, range=50 (-1128,-587,-29)

pojustice2010175, range=72 (-1176,-645,-28)

an_eyeless_gnawer (50%)
a_ravaging_burrower (50%)

pojustice2010177, range=90 (-1267,-573,-29)

pojustice2010179, range=72 (-1154,-504,-28)