One of the primary winter foods for reindeer is reindeer lichen, also known as reindeer moss. These are puffy, many-branched, pale green or grayish-white lichens up to 4½ inches tall, spongy to the touch when damp.
Multiple species of reindeer lichen cover extensive areas of ground in the Arctic tundra and Canadian boreal forest and also grow on mountain summits and at other sites throughout the Northeast. [Read more…] about Reindeer Lichen: Fungus and Algae Living Together