alder alnus glutinosa bilberry birch carex castlepollard cattle causeway ceann comhairle centimetre charales children of lir collinstown common goldeneye common pochard common teal convent curlew dovetail joint drainage basin dugout dwelling east effluent eleocharis elodea canadensis eurasian wigeon european union farm fen fish fishing flora fore abbey freshwater ft geographic coordinate system gin glacial lake great cormorant great crested grebe grey heron habitats directive hag hard water heather hectare hill history horse hydrocotyle ireland irish language lake lapwing little grebe lough lough lene gaels mallard marl marsh mass path metre mile moss mute swan national museum of ireland north oak oval paddle pennywort phragmites pollution polygonum potentilla palustris pyrola rotundifolia ranaghan randoon republic of ireland sailing schoenoplectus sea level shore snipe southwest species sphagnum stile stone swan swimming tufted duck turgesius turgesius island vegetation veil viking village water rail water supply wildlife willow windsurfing woodland yew