Lesser Goldfinch vs American Goldfinch

In short

The Lesser Goldfinch and American Goldfinch can be differentiated by their plumage and habitat preferences. The Lesser Goldfinch often has a greenish back, while the American Goldfinch is known for its bright yellow breeding plumage. Both species are small finches, but their behavior and vocalizations can also aid in identification.

Identification tips

• Plumage: Look for the greenish back of the Lesser Goldfinch versus the bright yellow of the American Goldfinch in breeding season.
• Seasonal Changes: Note the American Goldfinch's significant plumage change between seasons.
• Habitat: Observe the surroundings; Lesser Goldfinches may be in urban areas, while American Goldfinches are often near thistles or feeders.
• Calls: Listen for the American Goldfinch's 'po-ta-to-chip' call, distinct from the Lesser Goldfinch's mimicry.

Size

Both species are similar in size, small and compact, typical of finches.

Plumage

Lesser Goldfinches typically have a greenish back and a more muted yellow underpart, whereas American Goldfinches are bright yellow in breeding plumage and duller in nonbreeding plumage. The American Goldfinch undergoes a notable seasonal molt, which can change its appearance significantly.

Behaviour

The American Goldfinch is known for its late breeding season and granivorous diet, while the Lesser Goldfinch is adaptable to various environments, often seen in human-modified landscapes.

Habitat

Lesser Goldfinches are found in a range of habitats, including urban areas, while American Goldfinches prefer open areas with thistles and are common at feeders during winter.

Voice

Lesser Goldfinches are noted for their mimicry in songs, while American Goldfinches have a distinct flight call often described as 'po-ta-to-chip'.