Falcated Duck vs Chiloe Wigeon

In short

The Falcated Duck and Chiloe Wigeon are both medium-sized ducks with distinctive plumage, but they can be distinguished by their head coloration and wing markings. The Falcated Duck has a striking iridescent green head and a unique falcated (curved) tertial feather, while the Chiloe Wigeon features a more subdued green and white head pattern and lacks the falcated tertials.

Identification tips

1. Look for the iridescent green head and falcated tertials of the Falcated Duck. 2. Note the green and white head pattern of the Chiloe Wigeon. 3. Consider geographic location, as their ranges do not overlap. 4. Observe wing markings; the Falcated Duck has a distinctive white wing patch not present in the Chiloe Wigeon.

Size

Both species are similar in size, typical of medium-sized ducks, with no significant differences in overall body size.

Plumage

The Falcated Duck has a glossy green head with a white throat and a distinctive falcated tertial feather that curves over the back. In contrast, the Chiloe Wigeon has a green and white head with a more uniform body pattern and lacks the falcated tertials.

Behaviour

Both species exhibit typical dabbling duck behavior, often seen tipping forward in water to feed. There are no significant behavioral differences noted in the field.

Habitat

The Falcated Duck is primarily found in East Asia, favoring freshwater lakes and marshes, while the Chiloe Wigeon is native to South America, often seen in similar wetland habitats. Their ranges do not typically overlap.

Voice

Vocalizations are not a primary distinguishing feature between these two species, as both have typical duck calls that are not easily differentiated in the field.