Notoedric mange, a disease caused by mites, becomes epidemic in western gray squirrel populations and is a major source of mortality. Other species of eastern gray squirrels, fox squirrels, California ground squirrels and wild turkeys are expanding and compete with the western gray.
Principles of Design. Unity/Harmony. Definition of Unity: occurs when all of the elements of a piece combine to make a balanced, harmonious, complete whole. Unity is another of those hard-to-describe art terms but, when it's present, your eye and brain are pleased to see it. Definition of Harmony: brings together a composition with similar units.
Principles of Design. Variety. Definition: refers to a way of combining elements of art in involved ways to achieve intricate and complex relationships. Variety is often obtained through the use of diversity and change by artists who wish to increase the visual interest of their work. An artwork which makes use of many. different hues, values, lines, textures, and shapes would reflect the artist's desire for variety.