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

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