- A: Wings transparent with lots of tiny "cells", body long and slender with forked tail, wings held upright like a butterfly (Order Ephemeroptera)
- B: Wings transparent with lots of tiny "cells", body long and slender without forked tail, wings held either outward perpendicular to body (Fig. 1) or along body (Fig. 2) (Order Odonata)
- C: Wings with longer "cells" (Fig. 3), or wings are not transparent. (Infraclass Neoptera)
Figure 1. Wings held perpendicular
Figure 2. Wings folded along body
Figure 3. Wings can be not only flapped but also folded horizontally.