species such as fairy fern, Australian stonecrop and Himalayan balsam; reduce risk of predation (by predators such as crows and minks) of birds by constant conservation and preservation of hedges; encouraging grazing during the winter season and reducing it during summer to attract ground nestling birds, and controlled agricultural management to provide nestling sites for waders. References Llanfihangel Ysgeifiog Llangristiolus Marshes of Anglesey Nature reserves in Anglesey Sites of Special Scientific Interest in West Gwynedd Royal Society for the Protection of Birds reserves in Wales