I've been working on this with micron pens on a 18 x 24 sized paper for a few weeks... got lazy at some point....
The large feathers took the longest time.. probably an hour each for one >_<
I think I went through 5 or 6 micron pens (Size 005 and 01)
SORRY FOR BAD QUALITY >_<; Damn Digi-Cam was being... bleh...