Typically, the light reflectance of surfaces of interest ... Pérez-Contreras, T. Dark nests and egg colour in birds: a possible functional role of ultraviolet reflectance in egg detectability.

it is worth highlighting that the yolk colour does not matter in the context of the amount of the most important components present in the egg, i.e., protein and fat. In contrast, a light yolk ...

Why do some birds lay colourful eggs? From pale blue to speckled red, they come in every shade and hue. The answer, say scientists, is that coloured eggs evolved millions of years ago in birds ...