All birds lay amniotic eggs with hard shells made mostly of calcium carbonate. <answer>Hole and burrow nesting species</answer> tend to lay white or pale eggs, while open nesters lay camouflaged eggs. There are many exceptions to this pattern, however; the ground-nesting nightjars have pale eggs, and camouflage is instead provided by their plumage. Species that are victims of brood parasites have varying egg colours to improve the chances of spotting a parasite's egg, which forces female parasites to match their eggs to those of their hosts.
What type of birds lay white or pale eggs?
Hole and burrow nesting species