If I were to name the one bird that has given me the most trouble trying to photograph over the years it would have to be the Jay.
Jay's are incredibly shy and very wary of man and in particular one man...ME!!!
Here's a shot from one of my typical Jay encounters earlier this year...
I spotted him and tried to get myself into a position that offered good cover and a good chance of a shot, but the trouble was he spotted me before I was quite set.
All I got on this occasion was this one shot...At least he had the courtesy to fly off in my direction!