Wolf and dog (IMAGE) Experimental Biology Caption A wild gray wolf (left) and a domesticated Bernese Mountain dog (right), highlighting some common facial differences between the wolf and domesticated dogs. Most domesticated dog breeds have ears that lie flat, display a range of fur patterns and colors, and have a shortened snout. Red arrows indicate the levator anguli occuli medialis muscle, a muscle not found in the gray wolf that supports eye gaze communication between dogs and humans. Credit Anne Burrows, Duquesne University; left image copyright Defenders of Wildlife, Washington, DC. Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.