NPCs composing that spawngroup :

greater_scalebone (33%)

greater_skeleton (33%)

scalebone_skeleton (34%)

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

kurn_1, range=31 (-53,144,4)

greater_skeleton (100%)

kurn_5, range=71 (-80,215,45)

greater_scalebone (100%)
greater_scalebone (100%)

kurn_8, range=78 (-128,209,4)

kurn_45, range=45 (-108,183,-121)

kurn_52, range=52 (-130,169,-121)

kurn_54, range=93 (-31,220,-121)

Burynai_excavator (50%)
Burynai_sapper (50%)

kurn_55, range=82 (-82,226,-126)

kurn_103, range=65 (-83,209,-67)

Burynai_Excavator (50%)
Burynai_Excavator (50%)

kurn_110, range=97 (-152,214,-39)

Burynai_excavator (50%)
Burynai_excavator (50%)

kurn_117, range=61 (-44,191,-49)

Burynai_Excavator (50%)
Burynai_Excavator (50%)

kurn_119, range=51 (-37,163,-49)

Burynai_excavator (50%)
Burynai_Excavator (50%)

kurn_120, range=75 (-9,147,-49)

kurn_133, range=74 (-51,77,-39)

kurn_134, range=82 (-84,61,-39)

Burynai_Excavator (50%)
Burynai_Excavator (50%)

kurn_137, range=56 (-140,148,-39)

kurn_147, range=74 (-158,131,-39)

Burynai_excavator (100%)

kurn_148, range=38 (-122,146,-39)

kurn_150, range=76 (-111,72,-39)

Burynai_excavator (100%)

kurn_155, range=89 (-171,121,-39)

kurn_184, range=82 (-85,61,106)

greater_skeleton (50%)
scalebone_skeleton (50%)

#Crackling_Bones_189490, range=83 (-31,80,-39)

#Crackling_Bones (25%)
lesser_charbone_skeleton (75%)