How to use Lichen to Navigate! Let me know if you find the pattern! Lichens have algae and or cyanobacteria in them that photosynthesis to make their food Some species of lichen are especially sun loving, which makes them navigational tools! Pay attention to where you see more lichen growing on the sides of fence posts, tree trunks, and rocks. They can point the way for you! *note: this pattern is flipped in the southern hemisphere. The sun shines the brightest in the Northern Sky For more cool