Greater Scaup vs Java Sparrow

In short

The Greater Scaup and Java Sparrow are easily distinguishable by their habitat and physical characteristics. The Greater Scaup is a diving duck found in aquatic environments, while the Java Sparrow is a small passerine bird often seen in grasslands or urban areas. Their differences in size, plumage, and behavior make them unmistakable in the field.

Identification tips

• Location: Check the habitat; Greater Scaup in water bodies, Java Sparrow in terrestrial areas.
• Size and Shape: Note the size difference; Greater Scaup is much larger.
• Plumage: Look for the distinct head and body coloration; Greater Scaup has a green sheen on the head, Java Sparrow has a black head with white cheeks.
• Behavior: Observe feeding behavior; Greater Scaup dives, Java Sparrow feeds on the ground.

Size

The Greater Scaup is significantly larger, being a medium-sized duck, whereas the Java Sparrow is a small finch-like bird.

Plumage

Greater Scaup males have a distinctive black head with a green sheen, white flanks, and a gray back. Females are brown with a white patch at the base of the bill. Java Sparrows have a striking black head, white cheeks, and a pink bill, with a gray body and pinkish underparts.

Behaviour

Greater Scaups are diving ducks, often seen diving for food in water bodies. Java Sparrows are social and often found in flocks, feeding on seeds on the ground.

Habitat

Greater Scaups are found in freshwater lakes, rivers, and coastal waters. Java Sparrows inhabit grasslands, agricultural fields, and urban areas, often near human settlements.

Voice

Greater Scaups are generally quiet, with occasional soft whistles. Java Sparrows have a variety of calls, including chirps and trills, often heard in flocks.