beach coast green holiday ocean palm trees palms sand summer sun white birds coastline colors colours dune-flora dunes grass grasses greenery growing growth gulls levels low tide natural ocean edge ocean waterline pelicans plants receded receding receding tide rough salt-resistant sand-dunes Sandbar scrub seabirds seagulls tidal tides vegetation water waterbirds waterline contrast dark distance distant expanse golden golden glow light ocean sunset outdoors outside reflections seashore shoreline sunset sunset’s glow tide waves backdrop background coastal conservation conserve conserving contrasting cultivation environment environmental flora foliage leafy leaves nature ocean-edge ocean-waterline path track