Craig-yr-Allt: Invertebrate Math Eitemau Uwchlwytho gan 'A Dedicated Naturalist', the Mary Gillham Archive Project
Gwaelod-y-Garth: Invertebrate & Odonata Math Eitemau Uwchlwytho gan 'A Dedicated Naturalist', the Mary Gillham Archive Project
River Alun: Invertebrate & Odonata Math Eitemau Uwchlwytho gan 'A Dedicated Naturalist', the Mary Gillham Archive Project
