Many butterflies have different coloring and marks depending upon whether their wings are open or closed and whether viewed from the topside or underside. Males and females frequently are markedly different in coloring and sometimes in size as well.
It is important to know that butterflies and moths appear differently depending upon their manner of display.
These resource and reference links primarily (but not all) go to Wikipedia pages so the child may learn more about the butterfly or moth's habitat, lifecycle, coloring, etc.
More free butterfly color book sites will be added to this section soon:
These web pages provide excellent photos and information concerning butterfly and moth collections, research and cataloging.
These link primarily (but not all) go to Wikipedia entries for each butterfly or moth mentioned and illustrated in Paper Butterflies for Children's web site so the child may learn more about the butterfly or moth's habitat, lifecycle, male and female coloring, and other pertinent information.