Janet taught us (the MSc students and others) a handful of lichens that live on trees. With the help of a trusty app we have been racing to record lichens on trees throughout the northeast. The map gives the survey locations to date. I suspect Ray currently has the record for being most obsessed, but I have a (un)healthy fascination with the map – which can be accessed via the link below. https://eric-ne.maps.arcgis.com/apps/webappviewer/index.html?id=bcb8ca4119014c81b24fb6b052f075b1 . Photo by Carol Ross, a much better photographer than I.
If you want to get involved – I can put you in touch with Dr Janet Simkin, the creator of the survey.