What Kind of Birds Lay Blue Eggs

What Kind of Birds Lay Blue Eggs? The Complete Guide

What Kind of Birds Lay Blue Eggs? The Complete Guide

Bird's nest in their natural habitat.

The first time you see a blue egg you might be surprised. Eggs are supposed to white, right? This might make you think that you have a rare bird living in your yard. So what kind of birds lay blue eggs?

There are actually many species of birds that lay blue eggs. Red-winged blackbirds, Dunnocks, House Finches, and Black Tinamous are some of the most common birds that lay blue eggs. If you find a nest with blue eggs in it, we recommend watching from a distance to see what kind of bird comes back to the nest.

Let’s learn more about what kind of birds lay blue eggs.

Red-winged Blackbirds

The red-winged blackbird is one of the most abundant birds across North America. The male red-winged blackbird is black with yellow and red shoulder patches. The female red-winged blackbird is darkish brown, has a white eyebrow, and is slightly paler on the breast.

Dunnocks

Found along woodland edges, gardens, parks, and hedgerows, the dunnock is a relatively small bird that feeds on small insects, worms, and seeds. Males and females will are paired for life, but the female will mate with other males, laying up to five eggs at a time.

The dunnock is also known as a Hedge Sparrow, although it is not related to the sparrow family.

House Finches

Adult House finches have a brown tail that is square-tipped and quite long. They are a dullish brown on their backs and have wing feathers that are grey. The flanks are usually streaked, as are their breasts and feathers. Adult females have streaked underparts, and their upper parts are brown.

Interesting fact: Of all the birds in North America, the house finch has the most vegetarian diet consisting of ninety-seven percent vegetable matter.

Gray Catbirds

Although they appear completely grey, catbirds have a black cap and a blackish tail with a brown patch underneath. They can be found in most of North America and migrate to Mexico and Central America in the winter.

Interesting Fact: Catbirds can sing for up to ten minutes at a time and are able to produce over one hundred different types of sounds.

Black Tinamous

Black tinamous are found along the Eastern slopes of the Andes in the cloud forest; they are large and extremely rare. It is darker and plainer in color compared to the grey tinamou. With dullish brown underparts, they are hard to see in the field. Similar to other forest tinamous, you have more chance of hearing them than seeing them. Vocalizations include a series of low, modulated whistles and a low, drawn-out coo, similar to a dove but longer.

Common Mynas

The common myna (also known as the Indian Myna or Indian Mynah) is a member of the starling family. It is brown, has a yellow bill, yellow legs with a blackhead. Large white wing patches are evident when in flight.

Linnets

A small passerine bird, the linnet (Linaria cannabina) is a member of the finch family

Scientifically known as Linaria, due to its fondness of hemp and flax seeds, Linen is made from the flax plant.

Blue Jays

Blue Jays are highly adaptable and extremely intelligent birds and are natural forest dwellers. Most bird feeders in North America are familiar with these common and often noisy birds. The blue jay is able to expertly mimic several Hawk calls.

Song Thrushes

With the scientific name Turdus philomelos, the song thrush breeds across the Palearctic. It has three subspecies and characteristics include: buff or black-spotted underparts, and its upperparts are brown. Repeated musical phrases form a distinctive song, often referred to as poetry.

Eastern Bluebirds

Eastern bluebirds are extremely common in summer and are often seen perching on poles or sitting on telephone wires in the countryside. Male Eastern Bluebirds are a beautiful royal blue on their head and back, with a breast that is reddish-brown. Females are greyer in color yet look elegant with blue tinges in the wings and tail.

Snowy Egrets

Snowy Egrets are white herons with a black bill, medium in size, they have yellow lores. Adults have yellow feet and black legs. Juveniles have legs and feet that are greenish-yellow.

Snowy egrets forage in the wetlands in a relatively active style when compared to the Great Egret, which moves extremely slowly. The snowy egret has a bill that is larger than the cattle egret and, rather than walk in fields, is more likely to have his feet in the water.

Foster Egg Parents

Birds tend to resemble their foster parents, even if they aren’t hatched from the same egg as their foster parent species.

In a recent research effort, an experiment was conducted to investigate the effects of birds that grow up with different bird species. The researchers moved hatchlings between populations, and it was discovered that the hatchlings grew up to resemble their foster parents.

What Other Colors Can a Bird’s Eggs Be?

Nest with eggs on a tree in the wild in the spring.

As you might expect, the typical colors of bird eggs are neutral. Generally, the default color of all eggshells is white, and this is because it’s made up of calcium carbonate. The white can be different tones of white, from a more honeyed cream color to a more stark finish.

You may have even seen the commercial paint that is sold as ‘eggshell white.’ But there are more colors to an eggshell than white. In fact, eggshells can come in a variety of beautiful colors. However, no matter how varied the colors, the appearance is rooted in two pigments.

One is green, and the other reddish-brown and together with the underlying calcium carbonate can give rise to beautiful colors ranging from a dark deep blue to rich brown to an emerald greenish-white. The colors of eggshells form the underrated artworks of the natural kingdom.

Everything in nature has a purpose, so what purpose do the colors of an eggshell have?

Color for Camouflage

Aside from incubating new life in the form of developing embryos, eggs make a nutritious meal for many animals- even other birds. For this reason, eggs need to have an extra defense. This is where their color for camouflage comes in.

Bird eggs are a vital source of food for many creatures, including snakes, amphibians, and even other birds. Camouflage is extremely important when trying to protect one’s vulnerable offspring, and birds take full advantage of this.

Eggs that have neutral tones blend easily into the environment as they have similar colors to that of the nest material and therefore can even be laid on the ground and in open spaces (known as scrape nests.)To provide an extra layer of protection, birds will also decorate their nests with natural materials such as seashells or branches.

How Do the Colors Protect the Eggs from the Sun?

Sunlight can be extremely harmful to a bird egg, and the color can, and does, offer protection. The heat and radiation that is given off from the sun can damage the egg and can influence the incubation period as well as the development of the young, unborn chick.

When the heat from the sun affects the incubation period, and the development of the chicks is rushed, there are higher fatalities and a greater number of mutations. UV radiation (ultraviolet) will have less effect on a dark-colored egg, but a light neutral colored egg may be more at risk of overheating.

The heat from direct sunlight will greatly affect a darker colored egg, while a lighter colored egg is able to deflect some of that heat and stay cooler.

The geographic range of birds plays a major role in determining the coloring of their eggs. Generally, birds that live in an open and exposed environment that sees more sunlight will have lighter colored eggs. Birds that live in environments that are concealed and aren’t exposed to much sunlight will have darker colored eggs.

They have evolved over many generations to find the perfect balance between the best environment to lay their eggs in and the safest color. Birds in the same genus might have slightly different colored eggs because their demographics and habitat preferences differ.

Clues in Eggshell Colors

What Eggshells’ Color Tell us about their Health

Eggs that are bright and colorful are a great indication that both parents and chicks are in good health; it indicates that the mother bird has a nutritious diet and that the hatchlings should grow up healthy and strong.

Nest Care Habits

Generally, you will find that parents who regularly leave their nests to forage and regularly leave their nests unattended will have eggs that are greatly camouflaged. In contrast, parents who rarely leave their nests will have eggs that are plain in color with little or no camouflage.

Mismatched Siblings

Eggs in the same nest that look dramatically different (shape, color, or/and size) could indicate a brood parasite. These birds, such as cuckoos and brown-headed cowbirds, allow other species to raise their chicks for them by laying eggs in their nests without them knowing. The unsuspecting moms will raise them as foster chicks.

One of the most famous birds is the Robin, and the Robin has arguably some of the most renowned nest eggs too. The Robin is a shy bird, but if you look carefully in the underbrush, you should be able to spot this beautiful bird hopping about.

Why are Robin’s Eggs blue?

Nest of forest blackbird with green eggs in early spring forest

When the female Robin is laying her eggs, she deposits a pigment called biliverdin onto the eggshells, and this is why a robin’s eggs are blue. Evidence suggests that the higher the biliverdin levels are, the healthier the female is, and the color of the eggs will be brighter.

Eggs laid by females that are healthier seem to encourage males to be more present and more involved with their young. The biliverdin pigment gives Robin’s eggs a beautiful blue sheen and provides Robin’s eggs its trademark blue stamp.

Next time you are wandering in the garden and spot a robin, try to be quiet and calm and see if you can spot Robin’s blue eggs.

Parting Thoughts

Seeing blue eggs can be surprising at first! But as you’ve probably figured out, many kinds of birds lay blue eggs. It’s a natural color for their offspring. We hope you found this article on what kind of birds lay blue eggs useful and interesting. If you find blue eggs in your yard, let us know about it in the comments below.

Fly high friends!