I'd likely just do birds. All of my sketches for YCH are adjustable to any species of birds. :'D I'm totally ok with redoing the sketch to match the species. More or less my sketches are more for the posing than the actual image to be EXACTLY like that. So if you for example had an owl character you wanted drawn, but I had an eagle/hawk image drawn, I'd be happy to redo the sketch to match your owl character. Make sense?