Reindeer lichen-visible_UV_light (IMAGE) Dartmouth College Caption Because reindeer can see in the ultraviolet spectrum, their UV-absorbing food source, lichen , appears dark against the snowy Arctic landscape. Credit Nathaniel Dominy Usage Restrictions N/a License Original content 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.