I like drawing from a photo because it gives me time to study the object I want to draw and notice details that would not be apparent in the brief time you get to study a moving object like a bird.
It was easy to get the overall scene but getting proper proportions was challenging.
Drawing the yellow warbler made me realize that even the legs and feet of the bird are yellow. I would have missed that just looking at a photo.
When nature journaling I want to train my eye to notice what is actually there, instead of what I assume might be there.