bird care feeding home marthlet martin nest swallow tern 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 arrow bird house birdhouse direction house pilgrim shelter treehouse wind arrow wind shaft wooden baby egg fly little New old pretty young dead death fatal lost nature clouds hole sky summer