Great shot Chris! Also, a very clever observation: now that you mention it, I agree that most are L to R direction!! Why?! Is it because we, subconsciously, move our camera in a way as if we're writing?!
ps I saw Twinkel's photo, too! She's right in that her birds are going R to L but at the same time, they're flying away from the camera...so, they don't quite fit our definition/observation!
wouldnt it be great to be able to fly! i never noticed that about bird shots before ...! thats a nice walter you have going on there with no blur. good one.