Erica tetralix
A Special Area of Conservation has also been established around this north-eastern tributary of the Eastern Cleddau river. The site is designated for habitats including calcium-rich springwater-fed fens - Alkaline fens; the southern damselfly ("Coenagrion mercuriale"); marsh fritillary butterfly "Euphydryas (Eurodryas, Hypodryas) aurinia"; purple moor-grass meadows - molinia meadows on calcareous, peaty or clayey-silt-laden soils ("Molinion caeruleae"); wet heathland with cross-leaved heath "Rhostiroedd gwlyb" - Northern Atlantic wet heaths with "Erica tetralix"; very wet mires often identified by an unstable 'quaking' surface - transition mires and quaking bogs; and blanket bogs.