Cleaning up my older computer files I came across an amusing post on the birder's site Tweeters:
https://tweetersarchives.org/2013/April/24101602%5BTweeters%5D%20Lichen%20Conspiracy.html
https://tweetersarchives.org/2013/April/25063054%5BTweeters%5D%20Lichen%20Apology.html
Sacrificial lichen saves human - https://www.nzgeo.com/stories/the-microscopic-world-of-lichens/?fbclid=IwAR3RY7E09KrVEa4qphSpE3AHayTxHKEmSrtmmpJsbKY06l_lLfkNmuAl_ME
Thank you for sharing these Richard, it was a great way to start my day!
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