https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/4034118![Lichen burning on a tree. Original public domain image from Flickr](https://images.rawpixel.com/image_social_portrait/czNmcy1wcml2YXRlL3Jhd3BpeGVsX2ltYWdlcy93ZWJzaXRlX2NvbnRlbnQvbHIvZmwxOTE4MjcxNzU2Mi1pbWFnZS1rdTJmcXIzbS5qcGc.jpg)
![Lichen burning on a tree. Original public domain image from Flickr](https://images.rawpixel.com/image_social_portrait/czNmcy1wcml2YXRlL3Jhd3BpeGVsX2ltYWdlcy93ZWJzaXRlX2NvbnRlbnQvbHIvZmwxOTE4MjcxNzU2Mi1pbWFnZS1rdTJmcXIzbS5qcGc.jpg)
Lichen burning on a tree. Original public domain image from Flickr
Lichen burning on a tree. Original public domain image from Flickr
Public DomainFree CCO U.S. Government image for Personal and Business use