The last one I saw clearly was in Portland, while I was on a walk with my mom. I got a look at a tail while one flew away - their backsides are pretty flashy, you know. Turns out the killdeer we saw belonged to a small family group that took up residence in the Christian High School's field.
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Killdeer use the "broken wing" technique to lure predators away from their nests, which, according to my grandmother, can be anywhere they see fit to lay an egg.
I'm a big fan of their giant eyes... pretty bird.
P.S. Pardon the giraffe.