Spotted five individuals feeding at Low Tide while driving, parked, and walked a bit closer for attached photos. One bird kept glancing up into the sky (third photo) checking out for predators.
Underwing pattern is visible, I am just not super sure from this distance and lighting, but maybe someone knows. I think it should be identifiable, or at least highly suspectable.
A pair trading hoots and a stretching sort of display for quite a long time. Perhaps a mating ritual.