2. I know for me, when I have seen this bird "it's all yellow". Doing the sketch it allowed me to really look for details. Seeing the browns and black in the feathers, noting the truly black eye, and observing the shape, size and color of the bill are all details that, for me, may have gone unnoticed even if I had taken a photo but not completed a sketch!
A great aid to honing observational skills.