I sketched this on my own. No YouTube video this time for guidance. I find feathers particularly hard, but I tried one anyway.
This might be a hawk feather.
I think this is “good” on two levels: (1) I took the time to sketch it and (2) it shows progress. But I wouldn’t call it a good sketch of the feather. There is still lots of room for improvement.
It's a long story ... 
I think it’s really good…..you are far too critical of yourself. Good job!
Very nice!
“wouldn’t call it a good sketch”? If you say so, but I think it looks great.