Thanks for the comments, you've fortunately not seen some of my earlier efforts! It got to the point where I was thinking they were impossible to do, for me any way. I do know that al the fun will begin again with Great Crested Grebes this summer, watch this space.
I spent three hours sketching Curlews 'oop on't tops' at Whitley Common (Tim W will know where I mean, but when he wor a lad there were loads of birds there!) this morning. Alas these birds are not really approachable due to all the disturbance so it's a case of high mag. Disciplined myself to concentrate on structure and not fart about with plumage, which seems to work better. At a distance I can only make a suggestion of it out anyway. I've tried to capture the twisted head feeding posture on one bird. I'm growing increasingly fond of these birds as subjects as I wasn't the curlew's biggest fan - don't know why.
Looks like my scanner's on the way out - this isn't purposeful smudging!