bird-colonies birds breeding-place colonies color colors colour colours conservation contrast contrasting crowded dark estuarine-wetlands estuary estuary-waters fence fenced foliage food-supply forested-wetland habitat light low-lying melaleuca-rhaphiophylla migratory-birds nesting nesting-place nests nursery paperbark-trees paperbarks reserve ripples rippling rookeries rookery roosting roosting-place slow-flowing swamp-paperbark tidal trees vegetation water waterbird- habitat wetlands wildlife 2016 bird coastline nature coot flying Iran wetland dusky moorhen fauna feeding gallinula tenebrosa grass grassed area lakeside moorhen strong legged wader water bird wetlands bird BLACK VULTURE carrion Cathartes aura everglades foriday scavenger swamp Turkey turkey vulture vulture wing wings