The Late Blooming Summer Breeder: The American Goldfinch

While many bird species are already raising their young or preparing to see their nestlings leave, the American Goldfinch, also known as the Eastern Goldfinch, is only beginning its breeding season. This species is among the latest songbirds to reproduce each summer.

These late breeders often postpone egg-laying until the latter part of August, and it is not unusual for some American Goldfinches to wait until the beginning of autumn before starting their nesting cycle.

Look for American Goldfinches in Meadows and Open Fields

During the summer, walking past a large open meadow will often give you a good opportunity to see an American Goldfinch. As the bird flies overhead, its bright golden plumage can catch the sunlight in quick flashes.

The breeding male is especially easy to recognize, with a vivid lemon-yellow body, a deep black cap, and a small amount of white near the lower part of the body. Its flight is also distinctive, as it repeatedly rises and falls in a bouncing pattern while moving through the air.

Females are smaller and much less brightly colored. Their plumage is primarily a subdued brownish shade, making them less conspicuous than males. American Goldfinches commonly gather in meadows and fields filled with tall weeds because these areas provide plentiful seeds, which make up an important part of their diet.

American Goldfinch Nesting Season

As August arrives and the nests of many other bird species begin to empty, the American Goldfinch is just entering its main nesting period. Its relatively brief breeding season reaches its peak toward the end of August.

For backyard bird enthusiasts, this is an excellent period to watch for goldfinch nesting activity. The timing of their breeding season corresponds closely with the seasonal abundance of milkweed, thistle, and other plants that produce seed heads and provide useful nesting materials.

The American Goldfinch Builds a Remarkable Nest

American Goldfinch nests can be located in meadows, tall-grass fields, and areas containing shrubs. The birds may also choose to build their nests in residential backyards when suitable conditions are available.

The nest resembles the small cup-shaped structures made by hummingbirds. It is generally around three inches wide and no more than three inches high. Fine down from milkweed is carefully incorporated with twigs to form the nest, which is usually positioned several meters above the ground.

One of the most remarkable characteristics of the goldfinch nest is how tightly it is woven. The construction can make the nest essentially watertight. Although this seems beneficial, it can become dangerous during heavy rainfall because water can accumulate inside. If the female does not protect the nest during a severe storm, the nestlings can potentially drown.

According to ornithologists, the American Goldfinch is unique in having a nest capable of holding water in this manner.

The American Goldfinch Lays Its Eggs

A female American Goldfinch generally lays between two and seven eggs. Researchers have suggested that egg-laying may take place during the nighttime.

While some bird species produce several broods during a single breeding season, American Goldfinches normally raise only one brood each year. Their unusually late breeding schedule is thought to be one reason for this limited reproductive cycle.

The eggs are oval-shaped and usually pale bluish-white, sometimes displaying small light-brown markings. They are typically about the size of a peanut, making that comparison a fitting description of their relatively small dimensions.

Incubation lasts approximately two weeks. During this period, the female remains responsible for caring for the eggs while the male frequently brings her food. After roughly two weeks of incubation, the eggs begin to hatch.

From Nestlings to Independence

Like other passerines, or perching birds, newly hatched American Goldfinches emerge without feathers. During their earliest days, the female provides their food almost exclusively, feeding the chicks regurgitated seeds as they develop.

Watching a female feed can be especially entertaining. She may cling upside down to thistle plants while using her feet with remarkable skill to obtain seeds. Among finches, the American Goldfinch is unique in making extensive use of its feet while collecting food for its young.

The chicks grow rapidly. Their eyes open within approximately three days, and they soon develop a greenish-brown juvenile coat of feathers. Between eleven and fifteen days after hatching, the young birds begin preparing for life outside the nest by practicing short flights. These early flights remain close to the nesting site.

As the young become more capable, the female's constant feeding duties gradually decrease. The male begins taking a larger role in feeding the chicks and can locate them by recognizing their distinctive fledgling calls. Once the young birds become independent, they stop using this particular call.

A little more than two weeks after hatching, the young American Goldfinches are ready to leave the nest.

Life After the Nest

Once the nest has been emptied, the American Goldfinch's life cycle continues. In areas where human activity does not pose a major threat, these birds may visit backyard feeders along with the other locations they commonly use.

After the breeding season, bird enthusiasts can continue attracting American Goldfinches by planting perennial flowers such as zinnias, cosmos, and thistles. These plants produce the seed heads that goldfinches favor.

Unlike some bird species, American Goldfinches can actually benefit from areas where forests have been cleared. These short-distance migrants favor open habitats where weeds and other seed-producing plants can grow abundantly, giving them access to one of their most important food sources.

Following their fall migration, the American Goldfinches return and once again become a familiar sight for late-summer birdwatchers as they begin another breeding cycle.