A global community of nature enthusiasts
photographing and learning about wildlife
Greenish blueish, crusty, flat lichen, with a black underside
Lichen is growing on a metal fence near a forest
A lichen is not a single organism, but a symbiotic relationship between 2 fungi and an algae. Some lichens grow very fast, while others grow very slowly, and can live for thousands of years. Lichens also live in a wide range of habitats. Some live in the tropical Amazon Rainforest, while others live in freezing Antarctica and Franz Josef Land.