You know how to bring down a creature without ruining what makes it valuable, guided by instinct rather than instruction. You gain the following benefits:
Careful Strikes. Whenever you reduce a creature to 0 hit points, you can so non-lethal, if you used an attack, spell or ability only targeting that creature. Further, in that case you don't damage valuable parts of it, unless you want to. This works even when you don't directly know which the valuable parts are.
Expertise. You gain expertise in the Survival skill.
Skilled Harvester. Once per creature when you make a check using the Survival skill to harvest materials from it. You only need half the usual amount of time to do so and gain one additional part, or if that is not possible, then you gain the part in slightly better quality than the result of your check would normally provide.