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.
The art principles set a standard in creating art, and once you become familiar with creating compositions, it is easier to choose which principles work best to communicate your message. Principles of Art Vocabulary. Principles of Art: Balance, proportion, emphasis, variety, movement, rhythm, and harmony Composition: Placement of visual elements in artwork Balance: Implied through the weight of an object, the balance is the sense of stability achieved