I originally got the UV lens to look at birds and maybe lizards, but it turns out to be more useful for flowers. There are many reasons for this, primarily that animal-made UV reflective pigments seem to break down too fast to be biologically useful and UV refractive feather structures seem to be more rare than expected. UV is used in the animal kingdom, but it’s mostly through UV fluorescence into the visible spectrum – so, while it’s not quite a failed experiment, it is a camera and lens combo that is more useful for plants.

Here we can see that one side of a flower petal is more reflective than the other, likely because the flower forms with the more reflective side on the inside of the bud, likely so that the reflective pigments are only exposed once the flower is mature.