Anthraquinone is a naturally occurring compound that is found in more than 175 plant species. When eaten, anthraquinone has a repellency effect in many wild birds and some wild mammals, including mice, voles, squirrels, prairie dogs, rabbits, raccoons, and feral swine. USDA-APHIS Wildlife Services worked with Arkion Life Sciences, LLC, to develop and register Flight Control® Max (shown on grass stems) for use as a wildlife repellent.