"The Greater Spotted, like all the woodpeckers, lays pure white eggs, with the faintest flush of pink from the yolk showing through the thin shell. The colourlessness of tis eggs is a characteristic that the woodpecker shares in common with most other birds that nest in holes and dark places. Colour in eggs is usually associated with exposed nesting sites, and apparently serves to camouflage the dainty morsels from the hungry gaze of the many creatures that are always ready to raid a nest. In a dark hole colour is useless, and it is a significant fact that the eggs of the majority of birds that nest in holes are white."