It's a relief to concentrate on one thing for a moment! The photo helps render line in 2D, and so makes translation to a drawing a bit easier. I wouldn't have noticed the differing textures of feathers without drawing them--and they were a challenge to do. I struggle a bit with moving from color to black and white (I only used pencil) in terms of showing hue as value. My bird looks a little too round and happy; I don't think I got the sense of energy of the photograph.