everything wanders a short way to check out noise or just at random. Some boarders between zones are like a warzone with literally hundreds of grey dwarf leavings, deed/critter leavings -- Ive got a plains/mistlands spot where a squito left me like 10 bunnies for no effort (hooray). One of my homes is a BF/plains border with a river and meadows .. I can collect skeleton, dwarf, deer, lizard and occasionally other items every single morning.