NPCs composing that spawngroup :

Burynai_Excavator (25%)

Burynai_sapper (25%)

greater_scalebone (25%)

lesser_charbone_skeleton (25%)

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

kurn_1, range=98 (-121,-186,6)

greater_skeleton (100%)
greater_skeleton (100%)

kurn_7, range=77 (-225,-138,-22)

kurn_11, range=66 (-172,-30,4)

greater_scalebone (50%)
greater_skeleton (50%)

kurn_19, range=38 (-143,-130,-117)

kurn_20, range=60 (-138,-151,-117)

kurn_23, range=86 (-246,-101,-123)

kurn_72, range=90 (-83,-48,-107)

Burynai_excavator (100%)

kurn_90, range=87 (-75,-73,-30)

kurn_111, range=78 (-146,-18,-23)

Burynai_Excavator (100%)

kurn_113, range=88 (-114,-19,-22)

Burynai_burrower (50%)
Burynai_excavator (50%)

kurn_125, range=98 (-186,0,-23)

kurn_129, range=76 (-228,-60,-23)

Burynai_Excavator (100%)

kurn_136, range=86 (-84,-53,-30)

kurn_154, range=63 (-164,-32,-23)

Burynai_Excavator (50%)
Burynai_excavator (50%)

kurn_158, range=35 (-184,-69,-23)

kurn_159, range=10 (-164,-85,-23)

kurn_160, range=61 (-183,-38,6)

greater_skeleton (100%)

kurn_172, range=95 (-89,-159,88)

kurn_183, range=51 (-126,-57,48)

greater_skeleton (100%)