Other food resources include leaves, shoots, buds, pollen, seed pods, sap, cones, bark, and twigs. Other nematodes attack bark and forest trees. Cinnamon is an evergreen tree characterized by oval-shaped leaves, thick bark, and a berry fruit. Diet includes fruit, flowers, nuts and tree bark. Peasants were reduced to eating tree bark and bird droppings. Northwestern tribes use spruce root, cedar bark, and swampgrass. This is lined with moss, leaves, grass and bark. Jiaochao were made from the bark of mulberry trees. Wycinanki originated with shepherds cutting designs out of tree bark and leather. They are polyphagous and feed on leaves, shoots, flowers, fruit, seeds, stems and bark. A photograph of rough tree bark is considered a visual texture. Young trees with bark between to are preferred. Sumatran orangutans spend far less time feeding on the inner bark of trees. The roots are thick, fleshy, and covered with bright orange bark. The outer bark and stem are astringent.