View up through canopy of Silver birches (Betula pendula) in winter, Insh Marshes, Cairngorms NP, Highlands, Scotland, UK, December. Photographer quote: "Fingers and toes might protest at -15c, but on a blue sky January day like this, I知 like a kid in a sweetshop. Shooting up through the canopy, the icing-sugared birches are etched against a vivid blue sky." Did you know? Birches are valuable recyclers of nutrients. Each year birch trees can produce between 3 and 4 tonnes of leaf litter per hectare.