NPCs composing that spawngroup :

Burynai_excavator (50%)

greater_scalebone (50%)

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

kurn_8, range=188 (99,9,4)

kurn_16, range=129 (169,31,-134)

lesser_charbone_skeleton (50%)
lesser_icebone_skeleton (50%)

kurn_30, range=149 (201,-152,-22)

kurn_31, range=136 (202,-137,-22)

kurn_32, range=197 (128,-151,-23)

Burynai_Excavator (100%)

kurn_34, range=144 (156,-98,-103)

lesser_charbone_skeleton (100%)

kurn_37, range=182 (146,-147,-104)

kurn_38, range=156 (172,-137,-104)

kurn_40, range=138 (153,-74,-104)

kurn_56, range=120 (171,14,-120)

kurn_57, range=95 (188,-26,-118)

greater_scalebone (100%)

kurn_58, range=127 (180,46,-119)

Burynai_Excavator (50%)
Burynai_sapper (50%)

kurn_64, range=114 (178,16,-120)

kurn_65, range=190 (166,121,-116)

kurn_75, range=41 (248,-49,-118)

Burynai_sapper (50%)
lesser_icebone_skeleton (50%)

kurn_76, range=62 (223,-41,-118)

Burynai_excavator (50%)
Burynai_sapper (50%)

kurn_78, range=25 (300,-8,-118)

Burynai_sapper (50%)
lesser_icebone_skeleton (50%)

kurn_79, range=47 (300,17,-118)

Burynai_Excavator (50%)
Burynai_sapper (50%)

kurn_88, range=139 (155,-83,-24)

Burynai_burrower (50%)
Burynai_Excavator (50%)

kurn_95, range=181 (224,142,-39)

Burynai_excavator (100%)

kurn_97, range=157 (128,-51,-49)

kurn_98, range=180 (104,-44,-49)

kurn_99, range=160 (124,-14,-49)

kurn_104, range=199 (154,123,-39)

kurn_107, range=168 (121,-71,-24)

kurn_109, range=162 (143,-108,-24)

kurn_114, range=137 (162,-92,-24)

kurn_115, range=170 (137,58,-39)

Burynai_Excavator (50%)
lesser_icebone_skeleton (50%)

kurn_174, range=171 (130,47,104)

kurn_182, range=147 (137,-42,9)

scalebone_skeleton (100%)

kurn_191, range=194 (109,58,-39)

an_undead_jester (20%)
thick_boned_skeleton (80%)