The livingroom of my house in S Africa had picture windows or big patio doors on three sides while the large garden was full of trees and birds including a big Cape Weaver colony of several dozen of their amazing nests. Consequently birds were always flying into the windows usually with unfortunate results, but one such accident was particularly sad for the following reason - there was a record of the impact, but I was unable to reproduce it. On the glass of the patio door was a perfect print of every feather in the birdās outspread wings, but the image was so subtle, it couldnāt be photographed successfully. Perhaps twenty-five years on recording it might be easier, avoiding dismantling the door, cutting out a section of the window and putting it on a lightbox or in a scanner.
Although now perhaps @captainendeavour will post something along the lines of , āAh you should have done such and suchā¦ā