Lake Duck vs Radjah Shelduck: How to Tell Them Apart

Lake Duck

Oxyura vittata

Large643 gWetland

The lake duck grows to 36–46 centimetres (14–18 in). Females weigh 510–700 grams (18–25 oz) and males 600–850 grams (21–30 oz). Males can be distinguished from Andean duck (Oxyura ferruginea), a similar species, by being smaller and having a flatter head.

ID text from Wikipedia, CC BY-SA 4.0

Photo: Leonel Roget · CC BY 4.0

Radjah Shelduck

Radjah radjah

Large885 gCoastal

Both the male and female of the species are mostly white, with dark wing-tips and a distinctive "collar" of dark feathers. When viewed from above, during flight or with wings outstretched, green bands are visible on the tops of their wings. To communicate, the female utters a harsh rattle while the male emits a breathy, "sore-throat" whistle.

ID text from Wikipedia, CC BY-SA 4.0

Photo: JJ Harrison (https://www.jjharrison.com.au/) · CC BY 3.0

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Photos and recordings are credited to their authors under the licence shown. Full profiles: Lake Duck and Radjah Shelduck.