In spring and summer, their nuptial plumage is bright yellow, with a black cap on the head, and black wings and tail (the males’ wings are striped with white bars). The female's plumage is olive-yellow, with touches of yellow on the neck and breast.
In autumn, they moult completely, and the male begins to resemble the female: his head and neck are now pale yellow, his back is olive-brown, and his breast brownish-beige. Males can be identified by their yellow shoulders.
The contrasting white rump is visible in flight.
Habitat and needs
These birds adore thistle and sunflower seeds. The American Goldfinch is a strict vegetarian, and can eat head-down, hanging from bird feeders or the tops of seeds and grasses.
They moult again in the spring; this is the only member of the Carduelis family to have mating plumage.
Feeding and traveling in flocks, the American Goldfinch is a sociable bird, except during the nesting period.
These birds beat their wings rapidly to gain height, and then let themselves drop momentarily, wings closed. What a lively flight style!
They reproduce later than most other birds, at the end of June or in July, when there is plenty of food and plant fibre for nest building.
Remaining calm, even when someone robs its nest, the American Goldfinch is really good-natured.
The male feeds his companion while she broods the eggs.
Their nest is so well made that it can hold water—unfortunately their nestlings can be drowned during heavy rains.
Relationship
Amateur birdwatchers love the American Goldfinch; they find them easy to identify, especially during the breeding season.
The American Goldfinch helps spread seeds.
Living with them
The American Goldfinch likes open ground, such as weedy fields with asters, sunflowers, thistles, milkweed, and grasses. It is also attracted to garden lettuce that has gone to seed.
Planting young trees or shrubs such as birch, maple, dogwood, or elderberry will provide nesting sites.
To prevent them from contracting contagious diseases, rake the earth around the base of bird feeders.
Participating cities where this animal has been seen