NPCs composing that spawngroup :

Burynai_burrower (50%)

Burynai_Excavator (50%)

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

kurn_1, range=64 (135,-200,5)

kurn_2, range=57 (124,-191,-23)

Burynai_Excavator (50%)
Burynai_excavator (50%)

kurn_5, range=34 (103,-223,-102)

greater_scalebone (100%)
greater_scalebone (100%)

kurn_7, range=58 (129,-217,-22)

kurn_8, range=49 (108,-244,4)

kurn_10, range=17 (87,-218,-102)

kurn_12, range=76 (50,-285,-97)

kurn_17, range=49 (60,-259,-99)

Burynai_excavator (50%)
lesser_charbone_skeleton (50%)

kurn_32, range=83 (128,-151,-23)

Burynai_Excavator (100%)

kurn_35, range=67 (80,-278,-99)

kurn_37, range=98 (146,-147,-104)

kurn_39, range=98 (76,-113,-105)

kurn_41, range=90 (48,-299,-97)

Burynai_sapper (100%)

kurn_42, range=79 (1,-174,-109)

kurn_43, range=33 (89,-183,-102)

kurn_89, range=82 (151,-190,-25)

kurn_142, range=91 (-20,-208,-23)

Burynai_burrower (50%)
greater_scalebone (50%)

kurn_144, range=24 (75,-187,-23)

kurn_145, range=60 (46,-156,-40)

Burynai_Excavator (50%)
greater_scalebone (50%)

kurn_146, range=91 (60,-120,-40)

kurn_156, range=15 (66,-197,-104)

Burynai_excavator (50%)
Burynai_sapper (50%)

kurn_157, range=80 (11,-157,-109)

kurn_161, range=71 (0,-221,90)

greater_scalebone (90%)
undead_crusader (10%)

kurn_163, range=81 (-10,-218,132)

kurn_165, range=37 (34,-219,132)

kurn_166, range=69 (23,-161,132)

kurn_168, range=87 (0,-160,132)

kurn_169, range=92 (0,-270,132)

kurn_175, range=51 (52,-163,124)

kurn_176, range=39 (63,-250,124)

kurn_178, range=57 (116,-175,124)

kurn_276926, range=98 (-28,-218,134)

greater_scalebone (90%)
undead_crusader (10%)