Alberta Birds of Prey Foundation
Alberta Birds of Prey Foundation: Harrier Hawk
This fact sheet about the harrier hawk, also known as a marsh hawk, gives information about appearance, diet, habitat and nesting.
Cornell Lab of Ornithology
Cornell Lab of Ornithology: Northern Harrier
Clear and concise facts, photos, and sounds of the Northern Harrier are depicted on this detailed site. A menu of topics includes: cool facts, description, range, habitat, food, behavior, reproduction, and conservation status.