Butterflies are the staples of several different types of painting. We often see them in paintings of the garden, and we also see them in more fantastical settings–i.e. those with fairies. In fact, if you look closely at many of the fairy paintings, you will be able to see that the fairy wings are actually butterfly wings.
The agony of drawing a butterfly is the fact that it is symmetrical, and drawing anything in perfect symmetry is difficult. However, I usually draw one side of things like butterflies and then fold my paper and put it in a window or on a light box and trace the other side from what I drew on the first side. In the above drawing, you can see that I drew that butterfly by folding the paper several times.
If you jump into drawing a butterfly and try to draw the entire thing perfectly from the start, the task can be overwhelming. I suggest drawing the outline of the butterfly first and break the rings into 4 sections.
Next, begin to draw the decorative details of one top segment and mirror that on the other side.
Repeat the process on the bottom segments.
Add even more details.