Blue-black Grassquit vs Copper Seedeater

In short

The Blue-black Grassquit and Copper Seedeater can be distinguished by their plumage: the Grassquit is predominantly dark blue-black, while the Seedeater is mostly cinnamon with a black crown. Both species are found in open habitats and may form flocks, but their coloration and song differ significantly.

Identification tips

• Plumage: Look for the dark blue-black color of the Grassquit versus the cinnamon and black pattern of the Seedeater.
• Behavior: Note the Grassquit's display flight during singing.
• Flocking: Both species may be seen in flocks, but the Seedeater often mixes with other species.
• Habitat: Consider the specific open habitat; Grassquits prefer weedy fields.

Size

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

Plumage

The Blue-black Grassquit has a uniform dark blue-black plumage, whereas the Copper Seedeater features a cinnamon body with a black crown, wings, and tail, and a white wing speculum.

Behaviour

The Blue-black Grassquit is known for its distinctive display flight, where males jump into the air while singing. The Copper Seedeater often associates with other seedeaters in large flocks, especially outside the breeding season.

Habitat

Both species inhabit open areas, but the Blue-black Grassquit is more associated with weedy fields and second growth, while the Copper Seedeater is widespread over eastern South America.

Voice

The Blue-black Grassquit's song is a key feature, as males sing conspicuously while performing display flights. The Copper Seedeater's vocalizations are less documented but are typical of seedeaters.