I captured a rather handsome house sparrow with my trusty dusty Canon Rebel XTi. Opening the photo in Adobe Illustrator I originally aimed for a much more simplistic, cartoony bird to match other bird illustrations I've done... Cardinal Space
...however, this illustration grew into a contemporary retro piece.
Sticking with simple shapes (circles, squares, lines, triangles) I decided to stay faithful to my feathered fellow's anatomy while rendering with minimal description. Geometric, but finessed, and daintily detailed just enough to make my sparrow recognizable and interesting. :) Adobe Illustrator CS2