Since the picture was clear, it was easier to draw looking at it as reference. However, I was having a little trouble with sizing and shading, as you can see there is minimal shading in my drawing. The bird came quite easily, I was having trouble with the tree branches and leaves. And the claws of the bird. I may not have noticed the brown markings on the belly of the bird if i hadn't been asked to draw it. Yes I think it would be far harder to get these details when drawing outdoors. Also, to get size positioning, negative spaces shading etc.