Circus pygargus, commonly known as the Montagu's harrier, is a bird of prey found in Europe and Asia. The name "circus pygargus" comes from the Latin word "circus" meaning circle or ring, and "pygargus" meaning white-rumped. There are several synonyms for this species including the marsh harrier, hen harrier, field harrier, and marsh hawk. These names reflect the bird's habitat and behavior. The Montagu's harrier prefers to live in marshes and wetlands, and feeds on small mammals and birds. As a skilled hunter and fierce predator, this bird of prey has inspired awe and admiration throughout history.