immature brown-headed gull (chroicocephalus brunnicephalus) swimming with mallards in background

brown white immature brownheaded gull chroicocephalus brunnicephalus adult animal background beak beautiful bird swimming birds birdwatching blue closeup coast country duck europe feather feathers floating green gulls juvenile lake lakes male mallard nature ornithology outdoor pond river sea seabird seagull seagulls surface swim water waterfowl wild wildlife wings brown-headed mallards