Whites and Sulphurs (Butterflies)

What can one say about these families: the whites are generally white, albeit with various markings; the sulphurs are generally yellow, albeit with various markings.

This material is under development and should be viewed as somewhat tentative.

Cabbage WhiteThe Cabbage White is perhaps the most common butterfly in North America.

pine whiteThe Pine White visits a daisy.

sulphurA sulphur visits a tufted vetch.

sulphurThe Sulphur (clouded?) sips nectar from a red clover.

Information from Wikipedia: Pieris (whites) Butterflies, Colias (sulphurs) Butterflies.

Fraser tartan