gwyach glustiog

== Welsh == === Etymology === gwyach (“grebe”) + clustiog (“eared, having ears”). === Noun === gwyach glustiog f (plural gwyachod clustiog) black-necked grebe (Podiceps nigricollis) Synonym: gwyach yddfddu great crested grebe (Podiceps cristatus) Synonym: gwyach fawr gopog === Mutation === === References ===