The sign at this viewpoint for the Horan Natural Area reads,
Hawks can be recognized by the way they hunt. A large hawk soaring in wide circles high above the confluence area could be a red-tailed hawk, ready for a sudden plunge to capture a meadow vole. But a hawk flying lazily about ten feet above the ground, sometimes holding its wings in a shallow V, is almost certainly a northern harrier. The northern harrier has a distinctive white patch on its rump. Its tail and wings, which are longer and more narrow than the red-tailed hawk's, make it a agile hunter of birds.