I've now done one drawing for each season. This drawing honours the alder (Fearn, March 18 - April 14), which is associated with courage; the symbols of the hawk and the planet Mars are the supporting cast. The period of the vernal equinox is an extremely important period in the Celtic year and "it is still considered a crime to cut down a sacred alder tree and he who does is considered the cause of any trouble in the village".
I'm learning a lot about balancing the elements and the importance of composition when using this kind of even symmetry. It's a lot trickier than it looks!
PS I've been rated. Not sure if this is a good thing or not!