Ruddy Duck

Overview

The Ruddy Duck belongs to a distinctive group of stiff-tailed ducks characterized by rigid tail feathers that are frequently held cocked upward, especially during display. Breeding males show a rich rufous-chestnut body, a glossy black cap, and a bright white cheek patch, paired with a distinctively colored bill during the breeding season. Females and nonbreeding males are duller brown with a dark cheek stripe crossing an otherwise pale face. The species breeds on marshy ponds and winters on a variety of lakes and coastal waters.

Feather Identification

• Tail feathers: Stiff, narrow tail feathers with little flexibility are a hallmark of the species, often held cocked upward at a steep angle - unlike the flat tails of dabbling or diving ducks.
• Body color: Breeding males show a warm rufous-chestnut body, strongly contrasting with a black cap and bright white cheek patch.
• Female facial pattern: Females and nonbreeding males show a dark horizontal stripe crossing an otherwise pale, buffy face, differing from the clean white cheek of breeding males.
• Wing feathers: Wings are relatively small and plain brown, lacking a bold wing stripe or speculum found in many other ducks.
• Overall shape: A compact, chunky body with a fairly large head and short neck complements the stiff-tail feather structure.

Plumage Notes

Breeding males show a rufous-chestnut body, black cap, and white cheek patch, with the stiff tail often held upright during display. Outside the breeding season, males become duller brownish-gray, retaining the black cap and white cheek but losing the vivid rufous tone. Females and immatures show a dark cheek stripe on a pale face year-round with an overall brownish body. The species undergoes a complete molt, with a flightless period during wing molt. Juveniles resemble adult females.

Habitat & Range

Ruddy Ducks breed on marshes, ponds, and shallow lakes with dense emergent vegetation across much of North America, providing cover for nesting and brood-rearing. In winter, they move to a wide variety of habitats including lakes, reservoirs, and coastal bays. The species is migratory across much of its breeding range, though some populations remain resident in milder climates.

Behavior & Field Notes

Ruddy Ducks are diving ducks that forage mainly by diving to feed on aquatic invertebrates and plant material in shallow water. Males perform an elaborate courtship display involving rapid bill-drumming against an inflated neck, producing a distinctive bubbling sound accompanied by a raised, stiff tail. Nests are built low over water in dense marsh vegetation, often woven into surrounding stems. The species is generally quiet outside of courtship, and flight requires rapid wingbeats due to relatively small wings for its body size.