I remember this being hard in my high school art classes, and it certainly hasn't gotten any easier. I feel like it got a little easier with each attempt, although I certainly have a long way to go! I also want to work on my light, sketchy marks -- my tendency is to go too heavy and dark right away.
I tried to remember the advice from the video about finding shapes in the bird's body. It took time, and there are still parts that I don't think I captured well (the breast region and the legs in particular), but I ended up being pretty happy with it. The tail was really challenging as was capturing the details of the feathers and markings. I found that the longer I spent on looking and revisiting, the more realistic my sketch got. I also found myself wondering how much time I should spend on the branch and leaves. I did notice some details about the leaves (serrated edges, alternating pattern) that I wouldn't have noticed if I hadn't have been looking so closely.
I'm nature journaling for two reasons: to prepare for a research trip I'm taking to South Carolina in March to learn more about whimbrel and their migration, and because I ask my own students to sketch and journal in science class. I want to experience the process more fully myself so I can relate and give tips to those who get stuck. I'm also excited to hopefully have a meaningful record of my trip like many of the journalers in the video.