At
Colonel Sam Smith Park you can almost always find large numbers of Red-necked Grebes in the spring and fall. During breeding season they get pretty aggressive and bellow out a very ugly noise. That's what the one red-neck is doing above. This is a species where the male and female share the same plumage; these are likely both breeding pairs. The couple below as you can see are cleaning up the area around their trailer and will probably soon be off to buy some beer and lottery tickets.
Click to enlarge and get a better look.