When it comes to bird eggs, most people imagine the standard brown or white varieties. However, nature has a surprise in ...

While you might be most familiar with “robin’s egg blue”, many species of birds lay blue-colored eggs. Why might this have evolved? Although scientists can’t go back in time to observe the emergence ...

Blue or speckled, tiny or large, bird eggs fit nature's design. Subscribe. Log In. ... Robins aren't the only layers of blue eggs. Eastern bluebirds may lay light blue or whitish eggs.

What bird lays blue eggs? What do chickadee eggs look like? Look at photos to help you identify bird eggs from 10 different species. advertisement. Birds & Blooms.

Although scientists can't go back in time to observe the emergence of blue eggs, they can think carefully about which properties might be most different between blue and non-blue eggs — which is what ...

David C. Lahti and Daniel R. Ardia, "Shedding Light on Bird Egg Color: Pigment as Parasol and the Dark Car Effect," The American Naturalist 187, no. 5 (May 2016): 547-563. DOI: 10.1086/685780 PMID ...

The answer behind why birds lay blue eggs lie in the sun's varying effects, including its harmful ultraviolet radiation. A light blue tint, for instance, allows the eggs to warm without overheating.

Blue tits were also found to lay eggs sooner if birch trees come into leaf earlier. This is some of the first evidence that birds use trees as a cue for timing breeding.

Shedding Light on Bird Egg Color: Pigment as Parasol and the Dark Car Effect, The American Naturalist 187(5):547-563 | doi:10.1086/685780 Editorial Standards Reprints & Permissions LOADING VIDEO ...