NPCs composing that spawngroup :

sonic_bat (33%)

sonic_bat (33%)

sonic_bat (34%)

NPCs spawning around that spawngroup :
(Max range : 200)

soldungb-Overseer_of_Air00, range=176 (-652,-62,-105)

soldungb_31, range=60 (-698,-237,-68)

sonic_bat (25%)
sonic_bat (25%)
sonic_bat (25%)
sonic_bat (25%)

soldungb_30, range=30 (-762,-237,-75)

lava_duct_crawler (50%)
noxious_spider (50%)

soldungb_28, range=75 (-677,-218,-81)

sonic_bat (50%)
sonic_bat (50%)
sonic_bat (50%)
sonic_bat (50%)

soldungb_27, range=197 (-590,-322,-71)

soldungb_26, range=189 (-587,-303,-69)

soldungb_24, range=135 (-656,-305,-66)

soldungb_23, range=176 (-625,-331,-65)

Solusek_kobold (50%)
Solusek_kobold_shaman (50%)

soldungb_22, range=185 (-638,-355,-65)

a_kobold_advisor (100%)

soldungb_21, range=169 (-652,-345,-66)

soldungb_20, range=174 (-595,-286,-69)

Solusek_kobold (100%)

soldungb_16, range=151 (-603,-240,-79)

soldungb_15, range=158 (-595,-179,-90)

soldungb_13, range=122 (-647,-272,-81)

soldungb_7, range=170 (-581,-224,-73)

soldungb_46, range=85 (-714,-131,-92)

soldungb_48, range=95 (-706,-124,-78)

soldungb_49, range=188 (-594,-103,-98)

sonic_bat (33%)
sonic_bat (33%)
sonic_bat (34%)

soldungb_50, range=132 (-696,-87,-100)

sonic_bat (50%)
sonic_bat (50%)

soldungb_51, range=58 (-726,-155,-91)

lava_beetle (100%)

soldungb_52, range=78 (-712,-140,-78)

soldungb_65, range=144 (-895,-205,-78)

lava_duct_crawler (50%)
lava_duct_crawler (50%)

soldungb_67, range=169 (-884,-313,-57)

lava_beetle (100%)

soldungb_68, range=130 (-877,-173,-79)

soldungb_82, range=188 (-688,-30,-105)

sonic_bat (33%)
sonic_bat (33%)
sonic_bat (34%)