Wern Las: Invertebrate Math Eitemau Uwchlwytho gan 'A Dedicated Naturalist', the Mary Gillham Archive Project
Clyne: Invertebrate Math Eitemau Uwchlwytho gan 'A Dedicated Naturalist', the Mary Gillham Archive Project
River Waycock: Invertebrate & Odonata Math Eitemau Uwchlwytho gan 'A Dedicated Naturalist', the Mary Gillham Archive Project
Brecon Canal: Invertebrate & Odonata Math Eitemau Uwchlwytho gan 'A Dedicated Naturalist', the Mary Gillham Archive Project
