Above is an illustration of the rare, but not impossible to find, Megeagris Gallopavo. These strange and upsetting "Treasure" Monsters occur usually in Fall, and are surprisingly tasty, if a bit dry.
No one is sure where they come from or what happens to them, but if you are venturing into the Inner Continent keep an ear out for a distinctive "GBL GBL" sound.
If split open they will dispense some small silver forks, knives, spoons, and a wide amount of savory foods.
Make sure to give thanks for the bounty or more will spawn nearby!
-The [UPDATED] Adventurer's Guide to the Continent