An extensive collection of photographs and paintings of various butterflies and some bees. Butterflies and moths are the only insect that have scales covering their wings. Butterflies evolve from caterpillars and may shed their skin four times or more. Butterfly relationship with plants are complex and are critical to plants as their reproduction are dependent upon the butterfly. Wing colors in butterflies appear in two types, pigment and structural, frequently combined in one individual. Pigment colors are familiar in paints, dyes, and inks, and are defined as specific substances with definite chemical composition. Structural colors are instead produced in a physical manner, similar to a rainbow.