Sand couch grass and shadow blowing gently in the wind on a bright blue day

desert dune barren land coast grass sand nature landscape beach green sand couch grass dunes marram grass nature reserve coastline salt marsh sea lavender wind shore seaside geology sand couch blue outdoor plant flora nobody wild field blowing sky botany couch geologic windy erosion tranquil couch grass sandy sand dune beach grass sunny day saltwater couch environment tidal flats airoma shadow dawn dusk