Backlighting by the winter sun (just as it sounds, illumination of something from behind) outlines the rich greens and the veining of Taupata leaves. Taupata (Coprosma repens) is a tough New Zealand native shrub/small tree found in coastal areas. Its leaves are so glossy that it is also called the mirror plant.
While the backlighting doesn't show the glistening leaf surface, it does show the liveliness of a plant that seems happy in really difficult situations - a bit of a tonic on a grey winter's day.