If there is one thing I have learnt while birding, it is to expect the unexpected! I was on a lake bank & fortuitously saw a movement in a very dense tree. Waited patiently shifting my position trying to get as clear a view as possible. Finally, after about 15 minutes I could get in a couple of shots at this one before it vanished again in to the thicket. Have to put it down as a lifer for now, though it is not a very clear picture.