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 apartments city docks dundee dwelling evening flats hill houses law river sea shore shoreline Tay town winter attached attachments buoyancy buoyant canoe canoeing canoing cold connected equipment equipped experienced gloved gloves kayaking kayaks lines motion movement moving outdoors paddlers paddles paddling prepared risks safety seated sit-ins sport sporting suitable suitably-clothed transport travel travelers travellers vests wintry