There is a wide spectrum of color in bird eggs, and they can be intricately maculated with splotches, blotches, and scrawls. They come in a wide range of sizes and shapes and must be both sturdy enough to support the weight of an incubating parent and porous enough to permit the hatching of an embryo. The eggshell provides the developing chick with everything it needs to survive and develop, with the exception of heat and protection. Discover the differences between bird species in terms of egg color, size, and incubation by learning to recognize their eggs. There are, in fact, birds that lay blue eggs, which may come as a fascinating surprise to some. As a result of a chemical called biliverdin, no less than twenty-two different kinds of birds are capable of laying blue eggs. Each species of bird lays an egg of a unique size and shape.
American Robin
Typically, the American robin will produce a clutch of three to five pale blue or sky blue eggs. In general, the length of the eggs is between 2.8 and 3 centimeters (28 and 30 mm), while their breadth is around 2 centimeters (80 mm) (20mm). Typically, robins are among the first birds that you’ll see and hear when you first open your eyes in the morning. A large portion of their time is spent searching lawns for earthworms.
Blue Jays
The Blue Jay’s eggs are the same color as its feathers, so that shouldn’t come as a shock. However, they don’t always produce blue eggs. On rare occasions, their eggs can even look green. It’s not just the woods where you’ll find blue jays; you’ll also find them in suburban and urban locations. They congregate in cities and suburbs near woodlands or large bird feeders. They prefer to live on the outskirts of large forests rather than in the city or the suburbs. In the center of a thick forest, though, blue jays are a rare sight. The forest’s fringes are more to their liking.
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Song Thrush
The glossy light blue eggs of a Song Thrush are speckled with black or purple. Their wingspan is about the same as that of a Song thrush (about 21 mm), and they have a small, compact body and a rather short tail. The adult female has a warm brown upper body and a light brown or yellowish-white breast that is heavily speckled with black arrowhead-shaped markings. One common distinguishing feature is a warmer orange hue on the flanks, just beneath the wingtip. Known for their smooth texture, these Dunnocks rank in the top four of our favorite biscuits
The Dunnock is often misidentified as a House Sparrow because of its similar appearance. A clutch of 4-5 eggs will be laid by the female, and they will be a glossy blue color with possible spots of red. They are extremely small, measuring only around 14 millimeters across and 19 millimeters in length.
Goldfinch
States like New Jersey, Iowa, and Washington all claim the goldfinch as their official avian symbol. In particular, goldfinches enjoy sunflower and nyjer (thistle) seed-filled bird feeders. Male spring finches are a vivid yellow with white and glossy black markings. Females and winter birds have duller plumage and darker bills and tails with a notch. About four to six greenish-blue or bluish-white eggs are laid by female goldfinches.
Red-winged blackbirds
These red-winged blackbirds prefer humid environments for raising their young. In the marsh, a single male will attract a large number of females to his nest, which is concealed among the cattails and bulrushes. Three to four bluish-green eggs with black, brown, or purple markings are typical for red-winged blackbird nests.
Magpies
The United Kingdom as a whole is teeming with magpies. They lay eggs that are bluish-green with brown spots, not unlike Blackbird eggs. With a breadth of about 24mm and a length of about 35mm, they are considerably larger than a blackbird.
Snowy Egrets
This endangered species is found in arid areas near lakes, ponds, and marshes. The snowy egret’s bill is black, and its feet are yellow. During mating season, the normally yellow upper part of the bill turns a vibrant red. During mating, the male will build the nest as a means of attracting a female. Nest construction is handed over to the female once she arrives. She will help the male gather nesting materials like twigs, small sticks, grasses, and Spanish moss for the nest, which she will then help construct. Usually nesting in trees or shrubs, snowy egrets lay a clutch of three to four pale greenish-blue eggs.
House Finch
Sometimes using nest boxes, house finches produce pale greenish blue eggs with brown speckling. From late March until late July, they will typically lay between four and five eggs. Eggs range in size from 16mm to 21mm in length and 1.3–1.5mm in width (13mm – 15mm).
Great Tinamou
This game bird is on the larger side and its tail hardly appears to be there at all. The huge tinamou was hunted to extinction because of its value as a food source. At dawn and dusk, it serenades us with its lovely melody. The size and color of these eggs are stunning. From roughly the middle of winter through the middle of summer, mating occurs, and the female may lay anywhere from two to four Other Birds That Lay Blue Eggs.
The same factors that explain why robin’s eggs are blue also explain why the eggs of other wild birds are often a similar shade of blue. Knowing how birds use color to mark their eggs helps birdwatchers recognize them and enjoy the uniqueness of each nest they encounter.
