A few days ago, Tom, aka "Fishing Guy" did a "what is it post", showing three cropped images and asking his readers to guess the subject of each image. One of his images was a close up view of Lichens.
Lichens are really fascinating creatures, a symbiotic combination as two organisms, a fungi and an algae or blue green bacteria, living as one. These composite organisms are described and given species names, even though they technically are two different organisms. I have not studied lichens, but I do find them fascinating. They seem to really "pop" on gray, wet days, like yesterday, so I decided to photograph some of these interesting organisms in our back yard, Mostly on fallen limbs of our Bur Oak, but also some on the fence post, and even on our concrete front porch. My question, what do you see in these lichens? Consider this a Rorschach inkblot test for naturalists.