Birds in Flight - What You See at Higher ISOs

For me, photography is still very much a learning curve game. After a couple of very interesting (read: very blurry) shots of a bird in flight, I bumped my ISO up from 100 (where I typically shoot) to ISO-1600. I usually shoot at 100, because there's a lot less noise in the image, especially when you're trying to do HDR. There are Noise Reduction filters; it's just that there's more to filter out when you get to shooting at higher ISOs. So, this picture isn't exactly perfect (I would have liked to have gotten more of the bird in flight in the image), but it serves to illustrate my efforts of trying something new and learning in the process.