It felt easier to draw from a photo rather than a bird such as a Yellow Warbler flitting around, not sitting still generally for me to get all the details right.
I didn't draw all of the twig that the bird was sitting on.
I would not have noticed the yellow/brown of the back of the head and leading into the wings. That was harder to capture in my drawing btw. I am not sure how much of a difference it would make in a field drawing but I will notice as I do one.