As I take these shots, and then work through them I am in awe of the vast number, so close to each other, and flying in high speed precision.

Click the image above for full screen to view how tight the formation is. Very impressive.
And, they will fly this was for thousands of miles during migration.
Amazing!
Hundreds, and they are one of the fastest birds. Usually we have small flocks for most of the year and we photograph them fishing. Now they gather and go even further south for a few months.