I have done my best to attribute this photo/artwork according to the preferences of the photographer or the source from which I have purchased or found the photo or artwork. Please respect their rights to their work by using and sharing their work as they have requested. This photo is by maf04, and is available via flickr, and you can find it here: (https://flic.kr/p/dG7JZr) I’m grateful they have made it available under the following licence: CC-BY-SA 2.0