That is a beautiful photograph. Magpies are my absolute favourite bird of all time and the plumage on this one is incredible, you're a very talented photographer to get such a dynamic and crisp shot!
Would it be possible to use this as a reference picture for a painting, not one for profit (I'm not that good anyway), but for my own personal enjoyment? I'd give you full credit and link you to the work afterwards. If not I respect that.