close-up of adult, breeding male mallard or wild duck (anas platyrhynchos) with a glossy bottle-green and purple head

adult anas animal asleep autumn beautiful beauty bird birdwatching blue bottle-green bottlegreen breeding bright close-up closeup collar colorful dabbing detailed details distinct duck environment eye falling fauna feathers glossy green head iridescent lake leaves male mallard metallic nature ornithology outdoors parks platyrhynchos portrait purple resting river shiny sleeping speculum sun sunlight vibrant vivid white wild wildlife