But mostly it's bark and branches. Still, you can get to know the trees by their shapes. Some have branches reaching up towards the clouds, some alternate up the trunk, and some hang down. Take a good look at the bark: some trees have shaggy, scaly bark, while others are as smooth and white as old bones.
Now's a good time to head outside with some paper and crayons to collect tree bark rubbings, or to draw winter portraits of the trees around your house.