Fairies

Reaper Fairies are a small, communal fairy that inhabits ancient temperate forests. Their unique eating habits and macabre nests are reason for their ominous namesake. Reaper Fairies are typically scavengers. Feeding on both rotting flesh and bones. Using their large front teeth they can strip bone clean and crunch bones easily. They are a major part in a forest ecosystem, keeping the forest clean of rotting carcasses. However they are also known to actively hunt live prey when food is scare. That also includes wayward human travelers.
Reaper Fairies have been known to exhume human grave sites. Hundreds of drones will work in unison to tunnel their way down and burrow into the coffin. It is also not uncommon for Reaper fairies to repurpose the coffin as a underground hive. Typical Reaper Fairy hives are made of forest detritus such as leaves, sticks, mud etc. However most if not all hives are typically build inside the ribcage of large scavenged animal, such as a deer or elk. This ribcage acts as another layer of protection for the hive. Hives are ruled by a single queen, who the hive tirelessly cares for and protects. She will lay thousands of eggs throughout her lifetime.