No, I didn't use a tripod for this, it was shot hand held. The 500mm lens is still pretty new, so I'm not used to calculating whether or not I really ought to use a tripod (didn't have one with me to the USA, at any rate). I just shoot and hope for the best.
For this one, at least, I had splendid weather, and I was sitting down resting my elbows on my knees.
Some of the other photos of birds that I took were shot in fairly dark conditions, and some of those leave a lot to be desired..
The Elusive Mr. Cardinal (44)