How to Identify Swainson's Hawk Feathers

What Swainson's Hawk's Feathers Look Like

Swainson's Hawk is a slim, long-winged buteo built for long-distance soaring migration, and its flight feathers are notably longer and more pointed than those of stockier relatives like Red-tailed Hawk. The primaries and secondaries are dark blackish-brown on the underside, contrasting sharply with much paler, almost whitish wing-covert feathers — this two-tone underwing (dark flight feathers, pale linings) is the single most useful clue on a found flight feather, since the trailing half of the wing is noticeably darker than feathers from the leading, covert portion. Tail feathers are pale grayish-brown above with several narrow dark bands and a slightly wider dark subterminal band, lacking the brick-red tone of Red-tailed Hawk. Body (contour) feathers vary enormously because Swainson's Hawk occurs in light, intermediate, and dark color morphs: light-morph birds show clean white breast feathers set off by a solid dark rufous-brown "bib" across the upper chest, while dark-morph birds show uniformly chocolate-brown body feathers throughout. Upperpart feathers (back, scapulars) are a warm medium brown with slightly paler buffy edging, giving a scaled look when fresh.

Step-by-Step: Is This Feather From a Swainson's Hawk?

• Measure length and shape. Primaries can reach 30+ cm with a notably pointed, tapered tip — longer and more slender than a Red-tailed Hawk's broader primary.
• Check for two-tone contrast. A flight feather that is dark on much of its length but pale near the base (where it would sit close to the body) fits the pale-lining/dark-flight-feather pattern.
• Look at tail banding. Fine, evenly spaced gray-brown bands with one slightly bolder subterminal band, and no rufous wash, point away from Red-tailed Hawk.
• Note any chest "bib" feathers. A solid dark rufous-brown feather transitioning abruptly to white suggests a light-morph bird's breast band.
• Consider the season and location. Found in open grassland, prairie, or agricultural fields, especially during spring/fall migration corridors, supports this species.

Similar Species & How to Tell Them Apart

Red-tailed Hawk is the most frequent confusion: its tail feathers show a warm rufous-red wash (in adults) rather than fine gray-brown banding, and its wings are proportionately broader and less pointed. Broad-winged Hawk is much smaller overall, with shorter, stubbier flight feathers and a bold black-and-white banded tail (wide bands of roughly equal width) rather than Swainson's finer multi-banding. Ferruginous Hawk, sharing similar open-country range, shows rustier, more rufous leg and covert feathering and lacks the sharp dark-chest-bib pattern of light-morph Swainson's.

Where & When You'll Find Them

Swainson's Hawk breeds across open grasslands, prairies, and agricultural areas of the western and central United States and Canada, then undertakes one of the longest migrations of any American raptor, wintering on the pampas of Argentina. Feathers are most likely to be found in open rangeland and farm fields during the breeding season (spring through late summer), and along traditional migration flyways in spring and fall when large kettles of Swainson's Hawks pass through in a short window, often molting flight feathers gradually over the winter grounds rather than on the breeding range.