Feldgeister ("field spirits"; singular: Feldgeist) or Korndämonen ("corn demons"; singular: Korndämon) are corn spirits or demons from German folklore. Feldgeister often are also wind spirits or wind demons causing lightning, wind and rain.
Numerous Feldgeister are known in German folklore, some shaped as animals, some in human form. The last grain heads and tree fruits are often left at their place as a sacrifice for the agricultural spirits. During harvest season Feldgeist flee deeper into the fields to escape the mowers. With the last cornstalks the corn spirit becomes trapped. Either it is killed by cutting the grain heads, threshing the corn or it is brought to the village in a ceremonial manner, shaped as a corn doll. Direct contact to the Feldgeist causes illness.
In 1929, the first depiction of Feldgeist as a cat with hair-like wind for fur, known as Windkatze or Wind Cat, which is another name of Feldgeister. These wind-themed cats were said to look like domestic cats with tornado-shaped tail and its fur that is looks like its hair are made out of the wind, and it always blowing in the winter season.
In 1935, the one of many Feldgeister's depictions is the second, the second depiction of Feldgeist as a wolf that out of fields. The Roggenwolf ("rye wolf"), which is another name of Feldgeister. These wolf-fields are field spirits that shaped as a wolf, the roggenwolves steal children and feed on them.
In 1942, the third depiction of Feldgeister as a Heupudel (meaning 'Hay poodle'), which is also another name of a Feldgeist. These poodle-fields are poodle-shaped field spirits that aren't much lore besides they're names and they are "being" of a Feldgeister.