We were lucky to have a couple of the long-tails come into the Slough before winter. You are right - very fast. Details in the grays and face/beak are nice. Wing feathers are great. Detail in the darker areas is there as well. I like that the eye seems to be looking at the viewer.
Not surprisingly, I wouldn't be able to improve on the crop:D
Good flying posture with the wings on the full downstroke. I like the detail on the nearer wing, and good job on the sharpness too. As Im not familiar with this species, I would love to compare how fast these guys fly compared to some of our faster flyers.