Wandering Whistling-Duck vs Crested Serpent-Eagle

In short

The Wandering Whistling-Duck and Crested Serpent-Eagle are unlikely to be confused due to their distinct appearances and habitats. The duck is a waterfowl with a long neck and legs, while the eagle is a raptor with a distinctive crest and broad wings. Observing their behavior and habitat can quickly help differentiate them.

Identification tips

1. Location and habitat: Check if the bird is on water (likely a duck) or soaring above forest (likely an eagle). 2. Size and shape: Note the size and silhouette; ducks have long necks and legs, while eagles have broad wings and a crest. 3. Plumage: Look for the duck's uniform brown color versus the eagle's distinctive crest and barred wings. 4. Behavior: Observe flocking behavior for ducks and solitary soaring for eagles. 5. Sound: Listen for the duck's whistling versus the eagle's piercing call.

Size

The Crested Serpent-Eagle is significantly larger than the Wandering Whistling-Duck, with a wingspan that can be more than double.

Plumage

The Wandering Whistling-Duck has a predominantly brown plumage with lighter underparts and a distinctive whistling call. In contrast, the Crested Serpent-Eagle has a dark brown body with a striking black and white crest, and barred wings and tail.

Behaviour

Wandering Whistling-Ducks are often seen in flocks near water, swimming or dabbling. Crested Serpent-Eagles are solitary or in pairs, soaring high above forests or perched conspicuously.

Habitat

Wandering Whistling-Ducks are found in wetlands, marshes, and lakes. Crested Serpent-Eagles inhabit forests and wooded areas, often near water but not on it.

Voice

The Wandering Whistling-Duck is known for its high-pitched whistling calls. The Crested Serpent-Eagle has a loud, piercing call, often described as a 'kee-wee' or 'kluee'.