Geier

Geiers (singular: Geier; pronunciation: GY-uhr; Germ. "vulture") are vulture-like creatures with an innate ability to move through trees. These vile creatures are harvesters who take pleasure in the pain of others. Geiers gut humans for their organs and blood as homeopathic medicines and aphrodisiacs within the Grimm creature community.

When a Geier transforms, the creature's hand elongates and grows sharp talons. Their feet grow an additional talon on their heel making attacks from the air more effective. They attack from above awaiting their opportunity.

The book entry says "Geiers are the vilest of all; they harvest human organs while their victims are still alive, seeming to take pleasure in the savage pain they cause. Carnage on the front lines (of battle) has provided them with a seemingly endless supply of viscera for their terrible trade."

They are based on the witch from Hänsel and Gretel.