I always think my bird drawings look like the bird is smiling. I think that's odd and really not very accurate but still I like following the lines of the little bird. I noticed the streaking more as I took the time to look at him closely.
I've started nature journalling as a way to focus on what I'm seeing and in all honesty as a meditation practice. I'm not what you'd call a gifted artist. I struggle with drawing but I still enjoy it and do it just for me as a way to quiet my mind. Now, seeing the journals of others I feel reassured that whatever I want to do is just fine. It's nice to see the variety of approaches and I like including simple drawings with written notes (I'm much better with words.)