What I feel, note, feel; more you target creature X, more the RNG favors spawning creature X.
My newest character, created in 3.62, targeted hares and black grouse. Got a lot of them. Then came across an elk. Killed 14 of them in roughly 9 in game months. Don’t see many hares spawning now.
Took few ingame months to see first Njerpez, killed him. Since then total Njerp kill count is 33+6(by dog). Many times when going to check traps, see 2-4 Njerpez warriors on my run. Process hides, do other trap section/area, see 0-4 Njerpez. For 4 trapping “zones”: that seems to get me 5 Njerpez per week.
I might do a side save* and stop targeting the spotted Njerpez; just to see if their spawn rate slows down, or if they build a war camp.
*if I rename save folder to something else, is it playable and/or can it corrupt the original character?