psychological phenomena

aging ambiguous animal appearances attitudes beak birds blend bold bonny bowing broad cage characteristics colours companion comparison conflict confusion details differences dilemma disagreement disappointment discomfort discourage dishonour displeasure dissatisfaction doleful doubted effects enemies engage feathers foot friend gap gloomy hard hateful head heron home humble hunching hungry image long melancholy misunderstanding mood obscure penitent personality phenomena posture predators prisoners problems psychological punishment puzzling sadness shy sick similarities slave sorrow species standing static stressful temper unhappy vague variation vertebrates white young zoo