It is not in the public domain but it has been released under the Creative Commons license stated below. You are free to use it for any purpose as long as you credit me as author and follow the terms of the license. Could you be kind enough to leave me a message on this page to inform me about your use of this picture.
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.