Bannow Bay is an excellent example of an enclosed estuarine system. The very extensive sand flats and mudflats exposed at low water attract a great diversity of wetland birds in winter including an internationally-important population of Light-bellied Brent Geese.
Salt marshes of exceptional species diversity are found above the mudflats and support Perennial Glasswort, a plant that is confined in Ireland to the South Wexford Coast.
Tintern Abbey has excellent woodland trails and important colonies of breeding bats.
Bannow Bay is Special Protection Area (SPA) IE004033 for thirteen named species of geese, ducks, waders together with wetland and waterbirds in general. The site is also Special Area of Conservation (SAC) IE000697 for eleven wetland and sand dune habitats.