Had a chance to see all three swallow species yesterday (Tree, Barn, and Northern Rough-winged).
Lighting was horrendous and my post-processing is shoddy (I seem to be suffering from PP block or some sort as of lately). But I'll take what I can get.
I've been trying to get a shot just when the swallow's lower bill breaks the surface. I came close a couple times but I couldn't get the timing of the focus to exactly match that moment. I had a few chances when they would fly directly at me - but those are a little more difficult to focus
All with the 300mm f/4. No teleconverter this time around - they were too close.