The Northern Hawk-Owl (Surnia ulula) is a medium-sized owl of northern boreal forests. It is panarctic, occurring in North America, Europe, and Asia. Unlike most owls, it is entirely diurnal.
The original was hand-drawn with pen and ink. The final image was scanned and converted to a vector graphic. I am working on a colorized version as well, which should be posted in a few days.