Originally posted by electricdawn:

Hm, I'm pretty sure they're just spawned in as soon as I hit something, and I've been in areas where I couldn't see one single greydwarf in the vicinity. I start hitting something, boom, they come out of the... ahem... woodworks.

They can spawn outside the range at which you can see entities and since their hearing range is larger than that it makes it appear that they are spawning due to you hitting things, when in reality they were always there