Wolf Lichen (image) University of California - Davis Share Print E-Mail Caption This lichen community is typical of the study area. The bright chartreuse lichen is wolf lichen (Letharia), which is poisonous and is said to have killed wolves historically in Scandinavia. Credit Jesse Miller/UC Davis Usage Restrictions Provide credit. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.