Thick-billed Seed-Finch vs Variable Seedeater

In short

The Thick-billed Seed-Finch and Variable Seedeater are both small, black seedeaters, but the Thick-billed Seed-Finch has a notably stouter bill. The Variable Seedeater may show white in the plumage depending on the subspecies and location, which can help distinguish it from the uniformly black male Thick-billed Seed-Finch.

Identification tips

• Bill shape: The Thick-billed Seed-Finch has a stouter bill compared to the Variable Seedeater.
• Plumage: Look for white markings on the Variable Seedeater, which vary by subspecies and location.
• Location: Consider the geographic range and subspecies variation of the Variable Seedeater when identifying.
• Group behavior: Both species may be seen foraging in mixed groups, so observe carefully.

Size

Both species are similar in size, typical of small seedeaters.

Plumage

Male Thick-billed Seed-Finches are entirely black, while Variable Seedeaters vary by subspecies: northern males are also black but may have a white spot at the base of the primaries, and southern males can have additional white on the belly, rump, and neck.

Behaviour

Both species forage primarily on seeds and are often seen in pairs or small groups. They can be found in similar open habitats.

Habitat

Both species inhabit weedy fields, pastures, and other open areas, often overlapping in range.

Voice

Vocalizations are not detailed in the notes, and distinguishing by voice may require local knowledge.