[4] The epicuticular wax coating on mature plum fruit gives them a glaucous appearance.

Another familiar example is found in the common grape genus (Vitis vinifera).

Their waxy character serves to hinder climbing of leaves, stem or fruit by insects.

On fruits, glaucous coatings may function as a deterrent to climbing and feeding by small insects in favor of increased seed dispersal offered by larger animals such as mammals and birds.

The blue-grey camouflage coloring of some species of birds and sea and land animals causes their appearance to blend with their surroundings, making their detection by predators or prey difficult.