Gull counting weekend, North castle, Skomer Island, 1987 Math Eitemau Uwchlwytho gan Archif Ynys Sgomer
Gull counting weekend, North castle, Skomer Island, 1987 Math Eitemau Uwchlwytho gan Archif Ynys Sgomer
Vegetation mapping at Skomer Head, Skomer Island, July/ Augustust 1989 Math Eitemau Uwchlwytho gan Archif Ynys Sgomer
Manx Shearwater chick ringing, Skomer Island, August 1990 Math Eitemau Uwchlwytho gan Archif Ynys Sgomer
Preparing for the bird count, Skomer Island, August1990 Math Eitemau Uwchlwytho gan Archif Ynys Sgomer
Bracken-pulling at North Valley, Skomer island, August 1989 Math Eitemau Uwchlwytho gan Archif Ynys Sgomer
Sarah Anthony conducting research, Skomer Island, 1999 Math Eitemau Uwchlwytho gan Archif Ynys Sgomer
