NPCs composing that spawngroup :

Burynai_excavator (50%)

Burynai_sapper (50%)

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

kurn_16, range=90 (169,31,-134)

lesser_charbone_skeleton (50%)
lesser_icebone_skeleton (50%)

kurn_31, range=98 (202,-137,-22)

kurn_34, range=86 (156,-98,-103)

lesser_charbone_skeleton (100%)

kurn_40, range=77 (153,-74,-104)

kurn_56, range=75 (171,14,-120)

kurn_57, range=37 (188,-26,-118)

greater_scalebone (100%)

kurn_58, range=97 (180,46,-119)

Burynai_Excavator (50%)
Burynai_sapper (50%)

kurn_64, range=72 (178,16,-120)

kurn_75, range=26 (248,-49,-118)

Burynai_sapper (50%)
lesser_icebone_skeleton (50%)

kurn_77, range=62 (284,-28,-120)

Burynai_excavator (50%)
greater_scalebone (50%)

kurn_78, range=83 (300,-8,-118)

Burynai_sapper (50%)
lesser_icebone_skeleton (50%)

kurn_79, range=96 (300,17,-118)

Burynai_Excavator (50%)
Burynai_sapper (50%)

kurn_88, range=79 (155,-83,-24)

Burynai_burrower (50%)
Burynai_Excavator (50%)

kurn_97, range=95 (128,-51,-49)

kurn_114, range=79 (162,-92,-24)

kurn_182, range=85 (137,-42,9)

scalebone_skeleton (100%)