"hey, saw your blog and some of the photos of portable rock art and wanted to share some really good ones that we have found over the years here in Maine . One here is just like the little finch (i call it) that you have a photo of. I have one here too that (i think) is of the Great Auk, a flightless seabird that was killed off by early Europeans. and we have many (dozens and dozens) of profiles and faces,,,, we are artists ourselves, so we have become privy to the wonderful stone art in the artifacts we find everywhere here ! ~ sam minot, Bucksport, Me."
rock art panel likely depicts the Great Auk. The art here is dated to ca. 18,500 years before present.