The brightest greens on the reserve throughout winter are provided by the mosses, not just in the upper bog, where the SSSI citation mentions 12 species of sphagnum moss, but the many other species, in long and cropped grass, on bare soil and stones, and on tree trunks and stumps - anywhere with poor drainage and low soil fertility. Accurate identification requires a strong magnifying lens and a good guide to the 800 UK species.