40d:Ambusher

Dwarves assigned to hunt automatically use the ambusher skill while hunting outside of the fortress, allowing them to sneak silently upon their prey. Dwarves using the ambush skill move slower, but cannot be seen by enemies.

As an ambusher gets closer to his prey, there is a greater and greater chance he will be spotted and stop ambushing. The ambusher's chances improve as her skill improves.

Immigrating hunter dwarves start with this skill. They come equipped with a set of mixed chain and leather armor, a full stack of iron bolts, and a crossbow. Starting dwarves with this skill get free leather armor.

In adventure mode, ambusher is skilled up by Sneaking and walking about. This will greatly reduce your speed just as it does in dwarf mode, but will cause hostile creatures not to attack you. Until you unSneak or someone spots you, you will gain a small amount of experience in ambushing with every step. Presently, smashing a creature's skull in with your bare hands does not count as being spotted, so the best way to tell if you're still sneaking is to check your speed in the bottom right of the screen. A peculiarity of Sneaking is that you are (almost ?) always spotted whenever you are standing next to a creature, even if that creature is unconcious or has both eyes ripped out, and never spotted in any other case.