Well the Killdeer was in fact hiding something. After the outburst displayed in yesterdays photo, we retreated letting the Killdeer have its peace but on the way out we stumbled into their nest full of eggs being incubated by one of the pair. The nest, just a little pile of pebbles, was located about a foot off the small gravel road we were driving away on. If we could speak Killdeer we would have let this pair know the nest site was not in the best location for dealing with humans in cars like us. We sure hope the eggs developed without incident.