Had not yet set up a good perch but found these two in a local park which has a lot of tree swallows. Canon EOS 7D, 600mm, ISO 640, f/6.3, SS 1/2000, flash at -2 2/3. Lightened up the males eye a bit.
Nick, lovely iridescence shown on the male's head, together with the wingspread. Comp wise, I would probably add to both sides, and add a touch more sharpening to the female.
Nick, excellent view of the action, eye level shooting angle and sweet clean BG. really liked the eye contact between the two...adds a lot IMO. good to see the male's foot. agree with space and sharpening suggestions above.