NPCs composing that spawngroup :

an_owlbear_ravager (50%)

an_owlbear_razorclaw (50%)

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

HollowshGremlin1328244, range=50 (2194,1176,175)

HollowshGremlin1328158, range=57 (2169,1265,172)

a_grimling_soldier (100%)

HollowshGremlin1328120, range=83 (2150,1126,143)

a_grimling_soldier (100%)

HollowshGremlinan__spurclaw, range=50 (2109,1191,168)

a_grimling_spiritist (100%)

HollowshOwls2428120, range=81 (2151,1129,146)

an_owlbear_fleshrender (100%)

HollowshOwls2428244, range=51 (2128,1167,159)

an_owlbear_fleshrender (50%)
an_owlbear_fleshrender (50%)

HollowshOwls_an_spurcla, range=85 (2077,1179,158)

an_owlbear_spurclaw (100%)

HollowshWolves1328120, range=83 (2150,1126,143)

a_patrolling_sonic_wolf (50%)
a_sonic_tracker (50%)

HollowshWolves1328158, range=57 (2169,1265,172)

a_sonic_wolf (50%)
a_sonic_wolf (50%)

HollowshWolves1328244, range=50 (2194,1176,175)

a_patrolling_sonic_wolf (50%)
a_sonic_tracker (50%)

HollowshWolvesan__spurcla, range=50 (2109,1191,168)