Harrier/ˈhæriər/ Definition 1 of 3Pro Tip 1/3Bird of Prey Harriers are birds of prey, meaning they hunt other animals for food. The harrier swooped down to capture its prey with impressive precision. Pro Tip 2/3Specific Species There are several harrier species, so specifying the type can be helpful. The marsh harrier is particularly adapted to wetland hunting. Pro Tip 3/3Habitat Context Harriers are often associated with open habitats, like marshes or fields. We observed the harrier's flight over the open marsh.