Viscera & Bits
"I have destroyed almost the whole race of frogs, which does not happen in that savage Batrachomyachia of Homer. For in the anatomy of frogs, which, by favour of my very excellent colleague D. Carolo Fracassato, I had set on foot in order to become more certain about the membranous substance of the lungs."
– Marcello Malpighi
Learning from the Natives Viscera, & Bits allows for more efficient and more reliable harvesting of animal products.
The chance for rare butchering drops is increased. This skill essentially affects all drops that isn't a guaranteed drop including more common items such as Stringy Sinew.
Some items will also have their potential quantities increased by this skill, such as Deer Hoof.