If the birds are subjected to predation then the birds that blend in with the environment will be left and the birds that stand out will be killed and eaten. Predation will be doing the selection for a specific coloration. As Dan said-this will be the wild type plumage.
The white birds probably blend with the white grave yard markers and the hawks have a hard time picking them out. The grave yard must have some place the birds can go to keep from being eaten by raccons at night.
Tim
The white birds probably blend with the white grave yard markers and the hawks have a hard time picking them out. The grave yard must have some place the birds can go to keep from being eaten by raccons at night.
Tim