By David Vignoni - http://ftp.gnome.org/pub/GNOME/sources/gnome-themes-extras/0.9/gnome-themes-extras-0.9.0.tar.gz, LGPL, https://commons.wikimedia.org/w/index.php?curid=739560
Originally uploaded by User:Gottoni under another file name different from the one used at Biomes, which mistakenly orphaned the long standing image history.