Have you ever been mobbed by a boisterous, double dozen of daffy ducks, and a gaggle of geese to boot? It happened to me one morning this past July while I was walking around a lake in the oak woodland foothills near Yosemite National Park. The experience, I can testify, was a bellyful of quacks, as I explain in this lighthearted elegy to a family of hybrid Mallard and American White Ducks. The post is illustrated by a collection of still and video photography showing a duckling breaking out of its shell with its egg tooth, foraging the mudflats, and the unusual feather colors produced by hybridization.