Ruddy Duck

Identification

The ruddy duck is a small, compact waterfowl easily recognized by its distinctive features. Males in breeding plumage are particularly striking, with a blackish cap contrasting sharply against bright white cheeks, a rich chestnut body, and a bright blue bill. In winter, males become dull gray-brown above and paler below with a duller bill. Females and first-year males are brownish with a blurry stripe across their pale cheek patch. All ruddy ducks share a characteristic long, stiff tail held cocked upward, a slightly peaked head, and a short, thick neck. The species' compact, short-legged build earned it the nickname "butterball." In flight, the solidly dark wing tops are distinctive, though ruddy ducks rarely take to the air.

Range & Habitat

Native to the Americas, ruddy ducks are migratory waterfowl that breed in marshy lakes and ponds. They winter in coastal bays and unfrozen lakes and ponds. The species became established in the United Kingdom following its introduction in the 1940s, and outside the Americas it is now considered a highly invasive species, prompting culling initiatives across many countries. Their breeding habitat preference for dense marsh vegetation near water makes them dependent on specific wetland ecosystems.

Behaviour & Diet

Ruddy ducks are excellent swimmers but awkward fliers, rarely taking flight and doing so only with rapid wingbeats low over the water. They are relatively quiet birds except during breeding season and brood-rearing, when vocalization increases. Males perform a remarkable courtship display called "bubbling," striking their lower mandible against their breast hard enough to create visible swirls of bubbles in the water. They feed primarily on plant matter including seeds and roots, supplemented by aquatic insects, crustaceans, and larvae. Pairs form annually and breed on the ground, with females constructing nests from grass in tall vegetation. Broods typically contain 5 to 15 ducklings, and females incubate eggs for 23–26 days before the young fledge within one to two months.

Best Time & Places to See It

Ruddy ducks are best observed during breeding season when they gather in marshy lakes and ponds in their native American range. Breeding grounds offer the best opportunities for viewing territorial and courtship behavior. During winter months, look for them in coastal bays and unfrozen freshwater lakes and ponds. The species is also present year-round in established populations outside its native range, including the United Kingdom where it has become well established since the 1940s.

Photography Tips

Capture the male's striking breeding plumage with its contrasting white cheeks and chestnut body against marshy backgrounds. The distinctive upright tail and compact body shape are key identifying features worth emphasizing. Photograph the remarkable bubbling courtship display when males strike their bills against their breasts, creating bubble patterns in the water—this unique behavior provides dramatic action shots. Since ruddy ducks are strong swimmers, photograph them from the water's edge rather than expecting flight photography. Early morning light best illuminates the male's brilliant blue bill and white cheek patches.