Crested Duck vs Knob-billed Duck

Crested Duck

Lophonetta specularioides

Large1.0 kgWetland

The crested duck is a medium-sized waterfowl species, with adult males reaching up to just over a kilogram. Males and females look similar, with males having a slightly more prominent crest than females. The feathers of the mantle, back and scapulars are dark brown with pale centers, giving a mottled appearance. The abdomen, flanks and tail coverts are light gray, with the tail itself being distinctly elongated and black. The upperwing is gray brown to light brown, with the secondaries having an iridescent coppery to greenish sheen, with a broad back band behind, narrowly edged with white.

ID text from Wikipedia, CC BY-SA 4.0

Photo: Brian Ralphs from Wheaton, IL, USA · CC BY 2.0

Knob-billed Duck

Sarkidiornis melanotos

Huge2.6 kgWetland

This common species is unmistakable. It is one of the largest species of duck. Length can range from 56 to 76 cm (22 to 30 in), wingspan ranges from 116 to 145 cm (46 to 57 in) and weight from 1.03 to 2.9 kg (2.3 to 6.4 lb). Adults have a white head freckled with dark spots, and a pure white neck and underparts. The upperparts are glossy blue-black upperparts, with bluish and greenish iridescence especially prominent on the secondaries (lower arm feathers). The male is much larger than the female, and has a large black knob on the bill.

ID text from Wikipedia, CC BY-SA 4.0

Photo: Koshy Koshy · CC BY 2.0

Photos and recordings are credited to their authors under the licence shown. Full profiles: Crested Duck and Knob-billed Duck.