Mr. Bald Eagle is a derivative of a work that has a Creative Commons Attribution-Share Alike 3.0 Unported license, and is also shared as such.
In Photoshop the background has been changed. I have modified the body and head, and also made it printable for a tee. Mr. Bald Eagle has also been modified to have a more human profile.
The original work can be found here.
As per the creative commons license agreement:
You are free:
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work).
share alike – If you alter, transform, or build upon this work, you may distribute the resulting work only under the same or similar license to this one.