bird flight gull herring gull nature sea seagull worthing Sea bird young birds fowl gaivotas gulls Lari Laridae Larus mew sea gull seabirds waterfowl wilderness wildlife hunting sea-gull water beak feathers grey immature urban animal feather header coast coastal England eye feet foot Great Britain kent Larus argentatus shore beack blue legs sit wing birds life blue background blue sky flying free freedom in flight sea birds sea gull in flight sea life sea view seaview sky background water bird white bird