Blue or speckled, tiny or large, bird eggs fit nature's design. Subscribe. ... Red-winged blackbirds lay pale blue-green to gray eggs with black or brown markings in their marsh nests.

Birds Got Their Colorful, Speckled Eggs From Dinosaurs A new study found that birds' dinosaur relatives had eggs with traces of two pigments—a red-brown one and a blue-green one.

In spite of their diversity, bird eggs derive their color from just two pigments: protoporphyrin, which produces a reddish-brown color, and biliverdin, which creates blue and green.

Four speckled bird’s eggs and a very protective… Share this: Click to share on Twitter (Opens in new window) Click to share on Facebook (Opens in new window) Click to print (Opens in new window) ...

Since the strength of egg shells depends on calcium, birds with low calcium in their diets have thinner and more fragile egg shells. However, the reddish-brown speckles on eggs don't require ...

Here’s what the experts say about brown, blue, and colored eggs. ... Generally laid by red or red-brown birds with red earlobes. A pigment protein called protoporphyrin is added as the eggshell ...

Host birds reject brown parasitic eggs more often the blue-green eggs. ScienceDaily . Retrieved June 2, 2025 from www.sciencedaily.com / releases / 2017 / 02 / 170208094428.htm ...

The rainbow of hues seen in modern bird eggs probably evolved in birds’ dinosaur ancestors, which had eggs with colorful and speckled shells. That’s according to a new study of fossil eggs in the ...

Since the strength of egg shells depends on calcium, birds with low calcium in their diets have thinner and more fragile egg shells. But the reddish-brown speckles on eggs don't require calcium at ...