NPCs composing that spawngroup :

lesser_charbone_skeleton (100%)

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

kurn_2, range=97 (124,-191,-23)

Burynai_Excavator (50%)
Burynai_excavator (50%)

kurn_30, range=70 (201,-152,-22)

kurn_31, range=60 (202,-137,-22)

kurn_32, range=59 (128,-151,-23)

Burynai_Excavator (100%)

kurn_37, range=49 (146,-147,-104)

kurn_38, range=42 (172,-137,-104)

kurn_39, range=80 (76,-113,-105)

kurn_40, range=24 (153,-74,-104)

kurn_57, range=79 (188,-26,-118)

greater_scalebone (100%)

kurn_76, range=87 (223,-41,-118)

Burynai_excavator (50%)
Burynai_sapper (50%)

kurn_88, range=15 (155,-83,-24)

Burynai_burrower (50%)
Burynai_Excavator (50%)

kurn_89, range=91 (151,-190,-25)

kurn_97, range=54 (128,-51,-49)

kurn_98, range=74 (104,-44,-49)

kurn_99, range=89 (124,-14,-49)

kurn_107, range=44 (121,-71,-24)

kurn_109, range=16 (143,-108,-24)

kurn_114, range=8 (162,-92,-24)

kurn_146, range=98 (60,-120,-40)

kurn_178, range=86 (116,-175,124)

kurn_180, range=89 (81,-49,129)

a_skeletal_cook (25%)
thick_boned_skeleton (75%)

kurn_182, range=59 (137,-42,9)

scalebone_skeleton (100%)