Migration seems to work ... I just met a mutant coyote with 527 HP in zone 979 (starter area). I think it is a bit too much for beginners. In the old version mutants in those zones were very rare.

Coordinates please see screenshot above the minimap.
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Is there a way to get more of the small animals (hamsters, hens, roosters etc) in the low danger areas and keep the mutants in the higer danger areas only?