NPCs composing that spawngroup :

a_cave_bat (100%)

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

warrens_6, range=56 (803,-791,-48)

a_kobold_guard (50%)
a_rabid_kobold (50%)

warrens_72, range=84 (774,-789,-48)

a_kobold_guard (50%)
a_kobold_guard (50%)

warrens_146, range=65 (904,-761,-61)

a_kobold_scout (50%)
a_kobold_scout (50%)

warrens_147, range=19 (861,-826,-61)

a_kobold_runt (50%)
a_kobold_scout (50%)

warrens_148, range=96 (801,-728,-65)

warrens_175, range=94 (826,-718,-61)

warrens_176, range=84 (896,-732,-61)