Several bird species lay blue eggs, often with variations in shade and speckling. Here are some notable examples:
- American Robin : Lays light blue eggs, typically 3-5 per clutch, commonly seen in North America
- Dunnock (Hedge Sparrow) : A small Eurasian bird that lays glossy blue eggs, usually 4-5 per clutch, with rarely any speckles
- Common Blackbird : Lays bluish-green eggs with red speckles, found in Europe, Asia, and North Africa
- Mountain Bluebird : Lays pale blue to bluish-white eggs, nesting in tree cavities in western North America
- Blue Jay : Lays bluish eggs with brown spots, common in North America
- House Finch : Lays pale bluish-green eggs with speckles, found in North America
- Song Thrush : Lays light blue eggs with black speckles, found in Europe and Asia
- European Starling : Lays bluish to greenish-white eggs, found in Europe and North America
- Red-winged Blackbird : Lays blue-green to gray eggs with markings, found in North America
- Gray Catbird : Lays turquoise green eggs with red spots, found in North and Central America
- Eastern Bluebird : Lays pale blue, unmarked eggs, found in eastern North America
The blue coloration in these eggs is due to a pigment called biliverdin, which also provides camouflage to protect the eggs from predators
. In summary, many birds including robins, dunnocks, blackbirds, bluebirds, and several others lay blue or bluish eggs with varying patterns and shades depending on the species
