marreca-caneleira vs olho-dourado-da-islândia

The Fulvous Whistling-Duck and Barrow's Goldeneye are easily distinguished by their structure and plumage. The Fulvous Whistling-Duck has a long neck and legs, while Barrow's Goldeneye is more compact with a distinctive head shape. Plumage differences are also stark, with the Fulvous Whistling-Duck showing warm brown tones and the Barrow's Goldeneye having contrasting black and white patterns.

1. Structure: Look for the long neck and legs of the Fulvous Whistling-Duck versus the compact, rounded shape of Barrow's Goldeneye. 2. Plumage: Note the warm brown tones of the Fulvous Whistling-Duck compared to the stark black and white of Barrow's Goldeneye. 3. Head Shape: Barrow's Goldeneye has a distinctive head shape with a steep forehead and glossy black appearance.

Fulvous Whistling-Duck is generally more elongated with a longer neck and legs compared to the more compact Barrow's Goldeneye.

Fulvous Whistling-Duck has warm brown plumage with a distinctive fulvous (tawny) color, while Barrow's Goldeneye features striking black and white plumage with a glossy black head and white body.