Today's bird is a zentangle (TM) design. Art of this type, which is really an inspired kind of doodling, has probably been around forever, but it has been given its name and structure by Rick Roberts and Maria Thomas, a designer and a calligrapher. You can read about Zentangles, see more, and get started yourself at http://www.zentangle.com/.
This design is done with a .01 Pigma marker on a special piece of handmade paper called a Tile, that I got in my Zentangle kit. The shading is done with a 2B pencil.