What Bird Lays Blue Eggs? (37 Of The Most Common Species)

One of the most interesting things about birds is their eggs. While most bird eggs are white, there are actually several species of birds that lay blue eggs. In this article, we will explore what bird lays blue eggs, with photos and fun facts.

What Bird Lays Blue Eggs? (Most Common)

Red-winged Blackbird

Red-winged Blackbird
Image by JudaM from Pixabay

The Red-winged blackbird is one of the most widespread and well-known birds in North America. It is a member of the icterid family, which also includes orioles and meadowlarks. The red-winged blackbird is sexually dimorphic, meaning that males and females look different. Males have black plumage with striking red and yellow epaulets on their shoulders, while females are brownish-black with paler underparts. Both sexes have black eyes.

The Red-winged blackbird breeds across much of North America, from Alaska and Canada to Mexico. It is a bird of marshes and wetlands, nesting in reeds, cattails, or trees near water. The diet of the red-winged blackbird consists primarily of insects, although it will also eat berries and other fruits.

The eggs are usually a light-colored bluish green, and covered with brown and/or sometimes black spots. The eggshells measure about 2.4 cm long by 1.6 cm wide on average for each egg in the clutch​​​​​​​.

Tricolored Blackbird

The Tricolored Blackbird is a species of true blackbird. The adult male has black plumage with a violet sheen, while the adult female is dark gray. The bird gets its name from the fact that its wing feathers are edged in red and white.

The Tricolored Blackbird breeds in wetlands across North America. It is found in western Oregon and California, as well as in the Great Basin and parts of the Mojave Desert. The bird nests in marshes, often near water.

The Tricolored Blackbird feeds on insects, spiders, and other small invertebrates. It also eats seeds, fruits, and grains. The bird forages on the ground or in low vegetation.

Blue-gray Gnatcatcher

The Blue-gray Gnatcatcher is a small songbird found throughout much of the United States. Its name comes from its blue-gray plumage and its habit of catching insects in midair. The Blue-gray Gnatcatcher is a nonmigratory bird, meaning it spends its entire life in one place. The typical habitat for a Blue-gray Gnatcatcher is a forest with dense undergrowth.

These birds are also often found near streams or other bodies of water. The diet of a Blue-gray Gnatcatcher consists mostly of insects, which it catches in flight. The Blue-gray Gnatcatcher is a common bird that can be easily spotted by its striking plumage. If you’re lucky, you may even see one catching insects in midair!

The nest of the blue-gray gnatcatcher has an average clutch size of 4 to 6 eggs, which are usually light blue with brown speckles on it. The parents incubate the eggs for 13 days and when they hatch, both parents feed their young and protect them from predators. ​​​​​​​

Blue Grosbeak

Blue Grosbeak
Image by wileydoc from Pixabay

The Blue Grosbeak is a beautiful songbird that can be found in open habitats across the southern United States. This bird gets its name from its blue plumage and has a small, conical bill. The adult male Blue Grosbeak is mostly blue with black wingtips. Females and juveniles are brownish-gray with streaked wings.

The Blue Grosbeak has a large range, spanning from central Mexico to the southeastern United States. These birds are most commonly found in woodlands, prairies, and farmlands. They typically nest in trees or bushes and build their nests out of grass, twigs, leaves, and rootlets.

The diet of the Blue Grosbeak consists mainly of insects and seeds. During the breeding season, these birds will eat more insects to fuel their nesting activities. The colors of the eggs range from blue to white, and can sometimes be speckled with some tiny brown spots.

Related: 40 Blue Grosbeak Interesting Facts (Photos, ID & Info!) ​​​​​​​

Gray Catbird

Gray Catbird
Image by Jack Bulmer from Pixabay

The Gray Catbird, Dumetella carolinensis, is a small songbird of the family Mimidae. This feline-looking bird is found in woodlands throughout North and Central America. The Gray Catbird is sexually dimorphic, with males having gray upperparts and black underparts, while females are brownish-gray overall.

The natural range of the Gray Catbird extends from southern Canada to northern South America. This bird is a year-round resident of its range, except for northernmost populations, which migrate south for the winter. The Gray Catbird prefers habitats with dense vegetation, such as forests, shrublands, and swampy areas.

The diet of the Gray Catbird consists primarily of insects and other invertebrates. Gray Catbirds lay 1 to 6 cyan (bluish green) colored eggs that will be incubated by the female only. Incubation last about 12 to 15 days. ​​​​​​​The catbirds are known for their characteristic songs which can be heard throughout most of the year but are especially noticeable during mating season.

Bluethroat

The Bluethroat is a brown thrush with a blue and orange throat. They range from the tundra of Alaska and the Yukon Territory down to more temperate climates. Their habitats include open woodlands, marshes, and meadows. Their diet is mainly composed of insects and berries.

The Bluethroat is a shy bird that is most often heard rather than seen. They have a beautiful song which has been described as “liquid music”. The male Bluethroat is particularly known for his elaborate courtship display. He will sing and dance around the female, showing off his colorful throat.

The male then moves onto other patches of shrubs, where he sings again to attract females for mating purposes. The female will lay eggs that are usually blue or bluish green with thin reddish speckles all over it. They have clutch size of 5 to 7 eggs and incubate the eggs for 12 days.

American Crow

American Crow
Image by Jack Bulmer from Pixabay

The American Crow is a common and widespread bird in North America. It is found throughout the United States, southern Canada, Mexico, Central America and northern South America. The crow has been recorded as far north as the Arctic Circle in Alaska, to the Rocky Mountains of New Mexico.

They are mainly found in urban areas, but also inhabit rural farmlands. ​​​​​​​These birds are mainly omnivores, feeding on insects, small mammals, eggs of other birds as well as berries and fruit.

Crows are also known to nest in colonies, where they raise their young. Their eggs are bluish-green to dark yellowish-green color with small speckles of brown and grayish white, clutch size of 3 -9 eggs.​​​​​​​

Related: How To Attract Crows To Your Backyard: Expert Tips!

American Goldfinch

American Goldfinch
Image by Miles Moody from Pixabay

The American Goldfinch is a beautiful little bird that is found all across North America. These birds are most commonly found in open woodlands, meadows, and edges of forests. They are also often seen near human habitation, making them one of the most familiar backyard birds. American Goldfinches are small songbirds with a distinctive yellow body and black wings.

The males have a brighter yellow coloration than the females. These birds typically eat insects and seeds. In the summer months, they will often eat aphids and other small insects. In the winter months, they will switch to a diet of seeds from various plants. American Goldfinches are known for their cheerful songs, which can often be heard in the spring and summer months.

The American Goldfinch lays three to six bluish-white eggs usually covered with tiny brown spots, and incubation lasts 12–14 days.  The average size of the egg is 13.5 millimeters by 11 millimeters. In addition, female goldfinches will lay two clutches in one season, typically around 18 days apart from each other.

Related: Interesting American Goldfinch Facts You Need to Know!

Lesser Goldfinch

A lesser goldfinch perched on a plant.
Image by George from Pixabay

The Lesser Goldfinch is a small finch with a length of 4.0-4.5 inches. The male has a black cap, back, and wings with yellowish olive-green upperparts and white underparts. The female is similar, but has a brownish cap and lacks the black back. The juvenile is brown above and pale below, with indistinct streaks on the breast.

The Lesser Goldfinch breeds in open woodlands, brushy areas, and weedy fields in western North America from southern Canada to northern Mexico. It winters in the southern United States as far north as Kansas and Oklahoma. The diet of the Lesser Goldfinch consists primarily of seeds, including thistle, safflower, sunflower, and teasel seeds; they will also eat insects on occasion.

The Lesser Goldfinch typically lays 3-6 eggs that are light blue to light blue-green in color. Females incubate the eggs for about 12 days before hatching occurs.​​​​​​​

Cassin’s Finch

Cassin’s Finch is a small songbird that is found in North America. The bird has a red head, white breast, and gray back. The wings are black with white bars. It also has a tail that is black with white tips. The bird gets its name from a curator at the Philadelphia Academy of Natural Sciences named John Cassin. The natural range of Cassin’s finch extends from Alaska to Newfoundland, south to Arizona and California.

In the winter, the bird can be found in Mexico and Central America. The bird prefers open habitats such as forests, woodlands, and meadows. Cassin’s finch feeds on seeds, berries, and insects. The bird uses its long beak to reach into crevices to find food. The bird also eats tree sap and will often visit suet feeders in backyard gardens.

The eggs of this species are pale greenish blue, speckled with brown, black, and slightly purple in color. Their egg length is 0.7-0.9 inches (1.8-2.4 cm) and their egg width is 0.5-0.6 inches (1.3-1.6) and have an incubation period of 12 days.

House Finch

House Finch
Image by GeorgiaLens from Pixabay

The house finch is a small songbird that mainly inhabits North America. The bird’s natural range spans from the south of Canada to northern Mexico. The habitat of the house finch is varied, but the bird typically prefers open areas, such as fields or parks. The diet of the house finch consists mainly of seeds and insects.

The house finch is a relatively common bird, and it can often be seen in urban areas. The bird has a reddish-brown plumage, and the male House Finch typically has brighter coloring than the female. The House Finch is a popular bird for backyard birdwatchers, as it is easy to attract to feeders.

They prefer nesting near ground level in protected places like cavities or crevices, where their eggs will be safe from predators such as squirrels and snakes. This bird will lay one to six light blue eggs, usually tiny black speckles on them. The eggs will hatch within 12 to 16 days.​​​​​​​

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Varied Thrush

Varied Thrush
Image by Veronika Andrews from Pixabay

The Varied Thrush (Ixoreus naevius) is a medium-sized songbird found in forests throughout the Pacific Northwest of North America. The adult has dark gray-brown upperparts, a rust-colored throat and breast, and a paler belly. Its head is gray-brown with a white eye ring. The bill is black, and the legs are pink. The female is similar in appearance to the male, but is slightly smaller.

The Varied Thrush breeds in coniferous and mixed forests of the Pacific Northwest. It nests in trees or on the ground, often near water. The diet of the Varied Thrush consists primarily of insects and berries. In winter, it may feed on fruits and nuts. The Varied Thrush is not considered to be at risk of extinction, and its population appears to be stable.

The eggs of this bird are typically about 2 cm long with light blue coloring on top and brown speckles on the bottom. They usually lay between one and five eggs per clutch, but they can sometimes lay as many as eight eggs at once. The incubation period for​​​​​​​ 12 -14 days.

Related: How to Attract Thrushes to your Garden? (Expert Tips!)

Wood Thrush

The Wood Thrush is a striking bird with red-brown upperparts. The upper part of its throat and belly are white with black spots, and its rest is buff. It has a black head and a white ring around its eye. Its bill is dark brown, and its legs are pinkish-brown. The Wood Thrush ranges from southern Canada to central Mexico. In the United States, it breeds in the east from Minnesota to Maine, and south to Virginia and Kentucky.

It winters in Central America. The Wood Thrush inhabits deciduous forests, especially those with dense understories of shrubs or young trees. The diet of the Wood Thrush consists mainly of insects and other invertebrates. It also eats some berries and fruits.

It nests on the ground, often at the base of a tree or shrub. The Wood Thrush has a clutch of two to five eggs which are blue/green with no speckles, and incubates them for 12-14 days before they hatch into nestlings who stay in the nest for 12-14 days before they leave it.​​​​​​​

Eurasian Bullfinch

A Eurasian Bullfinch perched on a tree.
Image by Christiane from Pixabay

The Eurasian Bullfinch is a beautiful little bird that is found in Europe and Asia. It has a head and back that are black, with a white rump and tail. The underparts are pale pink, and the wings are gray. The Eurasian Bullfinch is a shy bird, but can be lured into gardens with the right food.

The Eurasian Bullfinch breeds in woods and scrubland, often near farmland. The nest is built in a tree or bush, and is made of twigs, leaves and grasses. The female lays 4-6 light-colored blue eggs, which are incubated for 12-14 days. Both parents feed the young birds.

The diet of the Eurasian Bullfinch consists of seeds, buds and insects. In winter, when food is scarce, they will also eat berries and fruits.

Blue Jays

Blue Jays
Image by Steve McLeod from Pixabay

The Blue Jay is a North American passerine bird in the family Corvidae. It is native throughout most of eastern and central North America, although it largely migrates to the western states. It is found in both deciduous and coniferous forests, and tends to be in residential areas.

The Blue Jay mainly feeds on nuts and seeds such as acorns, but will also eat insects and small vertebrates. The Blue Jay (Cyanocitta cristata) is a medium-sized songbird with a distinctive blue plumage. They are found in woodlands, gardens, parks, and open country across North America.

The range of the Blue Jay extends from southern Canada to northern Mexico. Blue Jays are well known for their intelligence and resourcefulness. The Blue Jay’s eggs colors can vary from greenish-blue tint, speckled with brown. Incubation is from 15 to 19 days.​​​​​​​

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European Starlings

Starlings
Image by Pexels from Pixabay

The European Starling (Sturnus vulgaris) is a small passerine bird that was introduced to North America in 1890. It is now one of the most common birds in the continental United States, with a range extending from Alaska to Mexico.

The bird is highly adaptable and can be found in a variety of habitats, including urban areas. The diet of the European Starling consists mainly of insects, but the bird will also eat berries and other fruits.

These birds are cavity nesters, which means they lay their eggs in a nest that is located in a hole or cavity in a tree. The blue eggs that they lay are a result of the diet of the female, which consists mainly of insects.

Related: How To Attract European Starlings To Your Yard Fast?

Eastern Bluebirds

Eastern Bluebirds
Image by Jack Bulmer from Pixabay

The Eastern Bluebird is a small thrush found in North America. The adult has blue upperparts, a rusty-red breast and white belly. They are found in open woodlands, farmlands and orchards. The Eastern Bluebird primarily eats insects such as grasshoppers and berries. The Eastern Bluebird ranges from Nova Scotia to Florida and west to the Great Plains.

In winter, they are found in the southern part of their range. The habitat of the Eastern Bluebird includes forests, fields and yards. The nesting habitat of the Eastern Bluebird is an open area with some trees nearby for perching and nesting sites. Nests are usually built in tree cavities or nest boxes placed by humans.

The female lays 3-5 eggs per clutch and can lay up to three clutches in a season. Their eggs are light blue to an almost whitish-blue color with brown speckles on them. The eggshells can be smooth or slightly rough with small bumps on them, and usually measure about 3 cm long by 2 cm wide. Nests are made up of twigs, grass, pine needles, and fur to keep it warm and dry for the young hatchlings.

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Western Bluebirds

Western Bluebirds
Image by stephmcblack from Pixabay

In North America, the Western Bluebird is a medium-sized, thrush-like bird. The adult male has a steel-blue back, wings and tail, with a rust-brown breast and white belly. The adult female is similar in appearance to the male, but with a lighter blue plumage.

The Western Bluebird ranges from southern British Columbia to northern California, and east to Montana and Wyoming. In winter, they can be found in southern parts of their range. Their habitats include open woodlands, orchards, parks and gardens. They feed on insects and berries.

Their eggs are light colored blue, bluish-white, or white with brown spots on them. They usually lay 2-8 eggs that are about 0.7-0.9 inches wide (1.8-2.4 cm). The incubation period​​​​​​​ lasts 12-17 days, and they typically lay two eggs per day on average.​​​​​​​

Related: 9 Best Birdhouses for Bluebirds (Top Picks for 2022)

Dunnock

Dunnock
Image by David Reed from Pixabay

Dunnocks are small, brown birds that are found in Europe, Asia and Africa. They typically live in woodlands and scrublands, but can also be found in gardens and parks. Dunnocks eat insects, spiders and other small invertebrates.

Dunnocks are shy birds that are not often seen by people. However, they are common birds in many parts of the world. In Europe, they are found in countries such as France, Germany and Italy. In Asia, they can be found in China and India. And in Africa, they are found in countries such as Kenya and Tanzania.

Despite their small size, Dunnocks are important members of the ecosystem. They help to control populations of insects and other invertebrates that can damage crops or spread disease. They build nests out of twigs and leaves, and lay blue eggs. This bird will build its nest in conifers or even bushes, laying 3-4 or 5 light blue colored eggs.

Some more birds that lay blue eggs.

  • American Robin
  • Blue Mockingbird
  • Snowy Egret
  • Great Blue Heron
  • Little Blue Heron
  • Common Myna
  • Snowy Egrets 
  • Lawrence’s Goldfinch
  • Grey-capped Greenfinch​​​​​​​
  • Bicknell’s Thrush
  • Clay-colored Thrush
  • Dusky Thrush
  • Swainson’s Thrush
  • White-throated Thrush
  • Bay-breasted Warbler
  • Olive Warbler
  • Eurasion Jackdaw
  • Mountain Bluebirds

Frequently Asked Questions

What determines the color of a bird’s egg?

The color of an eggshell is determined by the bile pigment biliverdin. Biliverdin is a greenish-yellow pigment that is found in bile, and it gives bird eggs their characteristic colors. The amount of biliverdin in an eggshell determines the intensity of the color.

For example, eggs with higher levels of biliverdin will be a brighter green, while those with lower levels will be a more subdued yellow. The color of an egg can also be affected by other factors, such as diet and environment.

For example, if a bird eats certain foods that are high in carotenoids (a type of pigment), this can give the eggshells a pink or brown tint. Similarly, if a bird lives in an area with lots of dirt and dust, this can also affect the color of the eggshells.