'As free as a bird' is a well known saying meaning you're completely free to do what you want and without any worry, or in this case, having freedom of movement. This saying has been written and manipulated into an illustration of a bird.
This poster belong to
Freedom of Movement

In last year's brief we talked about "a world where boundaries are becoming less and less meaningful. Now more than ever, we are one people. No matter where we live, we are all equally powerless in the face of war or environmental disaster."