Out on the Salt-marsh
In summertime the salt marsh is a haze of sea-pinks and sea-lavender. But in winter it's a desolate, mysterious place: its typical plants - glasswort, annual seablite, sea purslane and sea-arrowgrass - have to survive regular inundations by salt water.
JOHN BARRETT goes on a Radio Nature Trail to see the salt-marsh plants, and birds, near Dale in Pembrokeshire.
Introduced by DEREK JONES
Producer DILYS BREESE (Bristol) (Repeated: Wednesday, 9.5 am. Wildlife: Monday, 10.5 am)