Quail eggs have a pale yellow or beige background, but their appearance varies because of the amount of darker splotching—meaning there is no one-size-fits-all area for egg laying. Instead, researchers suggest that female quail "know" what their own eggs look like and will lay their eggs where they will be best camouflaged.

The birds seem to use two types of camouflage, said the study's lead author P. George Lovell, of the University of St. Andrews in Scotland—background matching and disruptive coloration.

Background matching is just what it sounds like; the pattern of an object to be camouflaged matches the pattern of its background, as when a peppered moth disappears on a tree branch.

Disruptive coloration, seen in zebras, works by visually breaking