Ключевые слова: activity, adorable, anas, animal, background, beautiful, beauty, bird, brown, chromosomes, cold, color, color loss, cute, domestic, drake, duck, ducks, feather, female, flying, genetic, genetic changes, head, heart, little, male, mallard, mutation, nature, one, outdoor, rare, research, snow, water, waterfowl, white, white background, wild, wildlife, wing, winter, yellow,