I was wrong... though I've only ever seen killdeer with one chick at a time, apparrently they usually lay four eggs... now that's an overworked parent.

http://www.birdwatching.com/stories/killdeer.html

"Baby birds that hatch with their running shoes on are called precocial. Precocial means "ripened beforehand." (The word comes from the same Latin source as "precocious.") Other precocial birds besides killdeer are chickens, ducks, and quail. None of these precocial babies lies in the nest and gets waited on."

Heh... ripened chicks. I think there's a joke in there somewheres.