Lesser Whistling-Duck vs Indian Spot-billed Duck

In short

The Lesser Whistling-Duck and Indian Spot-billed Duck can be distinguished by their size, bill markings, and plumage patterns. The Lesser Whistling-Duck is smaller and has a uniform buffy body, while the Indian Spot-billed Duck is larger with distinctive spot markings on its bill and a more variegated plumage.

Identification tips

• Size: Note the smaller size of the Lesser Whistling-Duck.
• Bill: Look for the distinctive white and black spots on the bill of the Indian Spot-billed Duck.
• Plumage: Observe the uniform buffy color of the Lesser Whistling-Duck versus the more variegated plumage of the Indian Spot-billed Duck.
• Vocalization: Listen for the whistling calls of the Lesser Whistling-Duck compared to the quacking of the Indian Spot-billed Duck.

Size

The Lesser Whistling-Duck is smaller and more compact compared to the larger and bulkier Indian Spot-billed Duck.

Plumage

Lesser Whistling-Duck has a uniform buffy-brown body with a paler face and throat. The Indian Spot-billed Duck shows a more variegated plumage with greyish body, darker head, and a distinctive white and black spot pattern on the bill.

Behaviour

Both species are often seen in flocks, but the Lesser Whistling-Duck is more likely to be found in larger groups. The Indian Spot-billed Duck tends to be more solitary or in smaller groups.

Habitat

Both species inhabit wetlands, but the Lesser Whistling-Duck is more commonly found in shallow freshwater bodies, while the Indian Spot-billed Duck can also be found in deeper waters and occasionally in more wooded areas.

Voice

The Lesser Whistling-Duck is known for its distinctive whistling calls, while the Indian Spot-billed Duck has a more typical duck quack. Vocalizations can be a useful distinguishing feature when the birds are heard.